Using Oly*fun for face masks? What you need to know…

Olyfun Non-woven material used for face masks and more

Several people have asked us is Oly*fun the same material used in surgical masks? The answer is… Sort-of. Oly-fun polypropylene non-woven material can be used for a variety of projects. As a non-woven it is similar to the material used in surgical masks, however, Oly*fun has not been tested or approved for medical use or filtration capabilities. Most commercially manufactured surgical masks are made of 3-ply 25GSM non-woven, whereas Oly*fun is 65GSM. Commercially made masks often include an additional filtration barrier.

While no material is guaranteed to provide 100% virus protection, in these difficult times when the CDC is requesting public assistance in making masks and surgical gowns we feel that Oly*fun nonwoven will work well for making DIY facemasks.

Before setting out to make large quantities of masks, be sure that you have the exact pattern and specifications from the organization for which you are making.

***Please note, homemade masks are not a substitute or replacement for N95 medical equipment.***

142 thoughts on “Using Oly*fun for face masks? What you need to know…”

  1. Jeanne Acton 907-262-3262 says:

    I would like to speak with someone from your company please. I have spoken to customer service and would like someone in a management position.

    1. Robin Dann says:

      Hi Jeanne,
      We have reached out to you via email for contact information.

  2. Carol says:

    I’m making face masks with sewn in filters of Oly fun. Will they be Dryer safe after washing?

    1. Robin Dann says:

      Hi Carol, We do not recommend machine washing and drying of Oly*fun, as the material will break down after time.
      We are hearing that people are making disposable masks using Oly*fun nonwoven material
      Or using the Oly*fun as the disposable filter insert in Cotton masks.

      ***Please note, homemade masks are not a substitute or replacement for N95 medical equipmen…and Oly*fun has not been tested or approved for medical use or filtration capabilities.***

  3. mary smetana says:

    Question: I purchased Oly Fun from Walmart on-line. Is the product quality of Oly Fun the same from Walmart as the fabric from your site (your site’s Oly fun craft pack Hot Fudge 65 GSM)? ( I purchased a bolt LFB06 sea green lot code Aug 2019 ) thank you in advance for your reply… Thanks for your products 🙂

    1. Robin Dann says:

      Yes, all Oly*fun is 65GSM

      ***Please note, homemade masks are not a substitute or replacement for N95 medical equipment. Oly*fun has not been tested or approved for medical use or filtration capabilities.***

  4. Jane says:

    Is there formaldehyde in the product? I couldn’t find an SDS on it; read that someone was having a reaction who is allergic to even trace amounts of formaldehyde

    1. Robin Dann says:

      There is no formaldehyde in Oly*fun.

  5. Libby Adams says:

    We are making hundreds of washable, reusable, pretty cotton face masks. They are not being made as disposable. What will happen to the Olyfun used as interfacing when it is washed and put in the dryer? Will this work, or do you totally not recommend them for this purpose?

    1. Robin Dann says:

      We have learned that several organizations are incorporated removable Oly*fun liners into washable cotton masks. The cotton masks can be sterilized, and the Oly*fun is disposed of after use, and replaced with new.
      ***Please note, homemade masks are not a substitute or replacement for N95 medical equipment. Oly*fun has not been tested or approved for medical use or filtration capabilities.***

  6. SONYA HILL says:

    I HAVE ANOTHER QUESTION SINCE I NOW READ THE Q AND A ABOVE…I’M STILL MAKING MY MASKS BUT THIS TIME INSTEAD OF SEWING THE OLY FUN TO THE MASK I WILL MAKE A POCKET, SO MY QUESTION IS IF I USE IT STILL AS A FILTER BUT REMOVE DAILY , CAN I WASH IT AND REUSE IT IN THE MASK AND HOW MANY TIMES CAN I WASH IT BEFORE REPLACING IT WITH A NEW ONE….I HAVE A LOT OF PEOPLE THAT WANTS IT SO BAD…

    1. Robin Dann says:

      We would recommend replacing the piece in the pocket with a new piece of Oly*fun.
      Machine washing and drying are not recommended for Oly*fun. We feel that repeated washing and drying may break down the material.

      Please be advised that Oly*fun has not been tested or approved for medical use or filtration capabilities. Its effectiveness as a germ barrier is unknown.***Please note, homemade masks are not a substitute or replacement for N95 medical equipment. ***

  7. Red says:

    I keep slreading that washing and drying will make the oly-fun break down. But, if I do wash/dry it rougjly how lo g do you think it ‘would’ last. Rough guess, 4 washes/drys, more or less? Also, on a more happier topic, would this work well for covering cushions on a patio set? The old canvas fa ric is worn out and Im lookong for a better option to cover the cushions with.

    1. Robin Dann says:

      Oly*fun is only meant to be used for temporary outdoor use. It does not hold up well under prolonged sun exposure or exposure to extreme heat.
      In answer to your question about washing. We recommend spot cleaning of Oly*fun so we do not have any information regarding machine washing and drying. We have heard that people are doing that, but we do not know at what rate the material will break down after repeated wash and dry cycles.
      If you decide to try it, please let us know how you make out.

      Remember, Oly*fun has not been tested or approved for medical use or filtration capabilities. Its effectiveness as a germ barrier is unknown.
      ***Please note, homemade masks are not a substitute or replacement for N95 medical equipment. ***

  8. Krista says:

    Any links to where one might purchase a reusable mask with the disposable filters?

    1. Robin Dann says:

      Fairfield Processing does not sell or have resources for the purchase of reusable masks.

  9. Teresa says:

    I just received Oly-fun from Fairfield via JoAnn. This morning, I placed two pieces of mask pattern size Oly-fun in a pot of boiling water and let them cook for a while. Oly-fun came out fine with no shrinkages. They did not melt. Why I didn’t see any changes?

    1. Robin Dann says:

      We are happy to hear that your test worked out so well.
      The product may deteriorate after multiple wash cycles. It will not shrink.
      Our lab has tested it to have a melting point of 120c (248 F) for this reason we do not recommend exposing Oly*fun to extreme heat.

  10. Teresa says:

    My questions are based on Oly*Fun make face mask for non-healthcare usage. I intend to use Oly*Fum as the top layer for water resistant only. There is a second filter layer. As recommended not to put Oly*Fun into washer or dryer, I intend to wash the mask by hands, sanitize it by cooking it in boiling water and hang it dry. Oly*Fun will not shrink, even it deteriorates after multiple washes, I think the mask itself is still effective. The mask only loses its water resistant function (acts like cotton); but the filter layer remains intact. Do you know how badly Oly*Fun will look? Will there be split or loose particles? If it is really bad, will an additional top cotton layer resolve the problem by catching all the loose particles?

    1. Robin Dann says:

      After repeated washings the Polypropylene nonwoven material will begin to break down, this could result in thin spots, pilling and tears.
      Oly*fun is very similar to the fabric used in reusable grocery bags. After a time it does break down and wear out.

      We can not speak to the filtration efficiency of the cotton that you are using as a cover.
      How about slipping additional pieces of Oly*fun inside your mask to retain its maximum benefit?

      **Please note, homemade masks are not a substitute or replacement for N95 medical equipment.**

      Oly*fun has not been tested or approved for medical use or filtration capabilities. Its effectiveness as a germ barrier is unknown.

  11. Teresa says:

    For this mask, cotton is not used as filtration – a second filter (Pellon no-woven interfacing etc.) layer already in the mask The mask does not need Oly*fun for filtration just for water resistant.. Slipping additional pieces of Oly*fun will have the same deterioration problem as the first Oly*fun layer. The addition cotton top layer is to collect the thin spots, pilling and tears.
    Thanks so much for the information.

  12. Niecy says:

    My question may be a simple 1. You said surgical masks are made with 3ply 25GSM non woven. You state all your Oly Fun is 65GMM. Is it also non woven?
    I know what 3ply is, but what does the numbers. 25 & 65 and the letters GSM & GMM refer to. I have been using Pellon interfacing for years, it seems to hold up through many washes. I seen in it stated that masks made with Non woven pellon is good for protection not just a filter. I want my critically ill son to have the best. I do hope you can help with an answer.

    1. Robin Dann says:

      Oly*fun is a 65 GSM non-woven material.
      GSM refers to the grams per square meter. It is used to measure the weight and weave of fabrics and non-woven materials
      for more info on GSM, click here

      We can not speak to the effectiveness or longevity of Pellon interfacing as we do not manufacture or sell that product.

      **Please note, homemade masks are not a substitute or replacement for N95 medical equipment.**

      Oly*fun has not been tested or approved for medical use or filtration capabilities. Its effectiveness as a germ barrier is unknown.

  13. Milna Nelson says:

    Can Shield Liner Fabric Craft Pack, Item #AFSGG10 be used for face masks?

    Thank you.

    1. Robin Dann says:

      Shield is a fabulous moisture barrier. So fabulous that neither moisture or air can get through, therefore it is not suitable for face masks.

  14. Marsha says:

    Is there a right or wrong side ?

    1. Robin Dann says:

      No, you can use either side of the oly*fun.

  15. Melissa Kurras says:

    If using as a filter for the pleated pocket mask, what size should the piece of Oly fun be?

    1. Robin Dann says:

      The size of your filter will depend upon the size of your mask and if you choose to fold it for a double layer.

  16. Joleen Petersen says:

    Can a bleach formula for disinfecting be used to disinfect? Can a Lysol spray be used disinfect the Oly*fun. These questions are in regards to using Oly*fun as a removable filter in face masks.

    1. Robin Dann says:

      yes, Olyfun can be wiped down with bleach or Lysol.

      Please take a look at the information that was provided by the Denver Mask Task Force.
      Here’s a link to the Denver Mask task force-

      https://docs.google.com/document/d/1nTBiOV74SIDaNqLFGWlpNVoeceU_WJLiGuCn0JU-x4g/edit

      Here’s what they have to say regarding washing the oly*fun filter-

      Washing/Sterilizing Instructions

      Autoclave Sterilization: The melting point for our polypropylene filter is 320°F. Standard operating temperature for Heat Autoclaves is 250°F. We recommend masks be double bagged, freestanding on stainless tray with minimal water added. If your mask includes elastic straps, they may not withstand autoclave sterilization. The WHO recommends heating to greater than 212°F for 2 min.

      Home Sterilizing Instructions:
      Oly-fun filter material should not be soaked long term in water. You can wash gently and air dry. The preferred method to sterilize them is to put them inside a freezer-weight Ziploc and drop them in a pot of boiling water for 15+ minutes.​ ​Instapot instructs to place items in silicone/metal steamer, on steam function with 750ml water. Newer models have dedicated sanitize button.

      Home Washing Instructions (for personal use)
      Gentle Wash & Air Dry – in this case, soap rather than heat is used to remove the virus from the fabric.

  17. Janice says:

    So this is what I found about washing Oly Fun-

    Home Sterilizing Instructions:
    Oly-fun filter material should not be soaked long term in water. You can wash gently and air dry. The preferred method to sterilize them is to put them inside a freezer-weight Ziploc and drop them in a pot of boiling water for 15+ minutes.​ ​Instapot instructs to place items in silicone/metal steamer, on steam function with 750ml water. Newer models have dedicated sanitize button.

    Comes from Denver Mask Task Force, here’s the link-

    https://docs.google.com/document/d/1nTBiOV74SIDaNqLFGWlpNVoeceU_WJLiGuCn0JU-x4g/edit

    1. Robin Dann says:

      Thank you for sharing this information

  18. Leona says:

    How do I wash my face mask that has OLY FUN lining?

    1. Robin Dann says:

      An earlier visitor provided this information from the Denver Mask Tasks Force, it includes information on washing Non-woven materials.

      Here’s a link to the Denver Mask task force-

      https://docs.google.com/document/d/1nTBiOV74SIDaNqLFGWlpNVoeceU_WJLiGuCn0JU-x4g/edit

      Here’s what they have to say regarding washing the oly fun filter-

      Washing/Sterilizing Instructions

      Autoclave Sterilization: The melting point for our polypropylene filter is 320°F. Standard operating temperature for Heat Autoclaves is 250°F. We recommend masks be double bagged, freestanding on stainless tray with minimal water added. If your mask includes elastic straps, they may not withstand autoclave sterilization. The WHO recommends heating to greater than 212°F for 2 min.

      Home Sterilizing Instructions:
      Oly-fun filter material should not be soaked long term in water. You can wash gently and air dry. The preferred method to sterilize them is to put them inside a freezer-weight Ziploc and drop them in a pot of boiling water for 15+ minutes.​ ​Instapot instructs to place items in silicone/metal steamer, on steam function with 750ml water. Newer models have dedicated sanitize button.

      Home Washing Instructions (for personal use)
      Gentle Wash & Air Dry – in this case, soap rather than heat is used to remove the virus from the fabric.

  19. S says:

    You are awesome to answer all these questions! Thank you.

    1. Robin Dann says:

      🙂

  20. April says:

    This may be a dumb question….. but if surgical masks are made of 3 ply 25GSM, added up wouldn’t that be almost equivalent to 75?…. And if yours is already 65GSM it would reason that your product would be pretty close to that……. Or is there a big difference with the fact it is 3ply?

    1. Robin Dann says:

      yes, it is close but there is always an added filtration benefit when you layer fabrics or materials.

      This video from The Fabric Patch gives a great explanation of the benefits of layering for filtration.
      https://www.youtube.com/watch?v=v8HNYKvlaN8&feature=emb_rel_end

  21. Carolyne Tighe says:

    Dr. Peter Tsai, inventor of the N95 mask, has written an article titled, “Information and FAQs on the performance, Protection, and Sterilization of Face Mask Materials.” In it, he talks about polypropylene, the same material Oly-Fun is made of, saying that it could be placed in boiling water for 3 minutes but it is important not to stir it. I take that to mean that although the product may begin to melt it will retain its structure if it is not agitated. In other words, no washing machine or dryer should be used. Note that “Oly-Fun is not mentioned as he is talking about the resulting product of his invention process. 25gsm. It becomes more breathable than 65gsm.
    I’m looking for the same answers as everyone here. I’m sharing what I think because we’re trying to decide on the best materials to use and how to use them. I bought Oly-Fun, shop towels, and Hepa vacuum bags to help make masks, but I feel like I’m going around in circles with info!

    1. Robin Dann says:

      Hi Carol, We agree that the amount of information out there is overwhelming. We know for sure that Oly*fun can be hand washed with soap and hot water. It can also be wiped down with bleach or Lysol. However, we have not tested Oly*fun for sanitation and sterilization effectiveness as that was not our primary marketing platform for the product.

      We have been provided a lot of information from people who are using Oly*fun. Perhaps the information you will find the information below from the Denver Mask Task Force in regard to the cleaning of Oly*fun to be helpful.
      Here’s a link to the Denver Mask task force

      **Please note, homemade masks are not a substitute or replacement for N95 medical equipment.**

      Oly*fun has not been tested or approved for medical use or filtration capabilities. Its effectiveness as a germ barrier is unknown.It has also not been laboratory tested for its ability to be sterilized.

      Washing/Sterilizing Instructions

      Autoclave Sterilization: The melting point for our polypropylene filter is 320°F. The standard operating temperature for Heat Autoclaves is 250°F. We recommend masks be double bagged, freestanding on a stainless tray with minimal water added. If your mask includes elastic straps, they may not withstand autoclave sterilization. The WHO recommends heating to greater than 212°F for 2 min.

      Home Sterilizing Instructions:
      Oly-fun filter material should not be soaked long term in water. You can wash gently and air dry. The preferred method to sterilize them is to put them inside a freezer-weight Ziploc and drop them in a pot of boiling water for 15+ minutes.​ ​Instapot instructs to place items in silicone/metal steamer, on steam function with 750ml water. Newer models have dedicated sanitize button.

      Home Washing Instructions (for personal use)
      Gentle Wash & Air Dry – in this case, soap rather than heat is used to remove the virus from the fabric.

      ***This information has been shared with us by an outside source. Fairfield Processing cannot speak to the accuracy of information or claims provided by outside organizations and individuals.***

  22. Ruth A Bryan says:

    Will the Oly Fun metallic work also as a disposable filter

    1. Robin Dann says:

      Due to the Laminated metallic coating, Oly*fun metallic should not be used to cover the face or head.

  23. Glenda Roy says:

    I’ve made a few masks (understand they are not approved for medical use) of cotton with a piece of OLY-fun sewn in the middle – with intentions of machine washing/air drying. I’m now making masks of just two layers of OLY-fun. Is that breathable enough to use safely?

    1. Robin Dann says:

      Two layers of Oly-fun as an inner filter along with the cotton mask should be perfectly fine for breathability.

  24. Roxana says:

    I’ve noticed that the metallic coating can easily be pulled away from the Oly*fun. Is that an option to make a metallic bolt usable in face masks?

    1. Robin Dann says:

      Oly-fun metallic should not be used to cover the face or head. The Metallic laminated coating will make it difficult to breathe.
      Even if you remove the coating, the lamination process may have altered the nonwoven material. We would not recommend using the Metalic Oly*fun for face masks

      **Please note, homemade masks are not a substitute or replacement for N95 medical equipment.**

      Oly*fun has not been tested or approved for medical use or filtration capabilities. Its effectiveness as a germ barrier is unknown.

  25. Roxana says:

    It appears that my question disappeared, so please forgive and delete if it is still in the system. My question is: I’ve noticed that the metallic coating can be pulled away from the Oly*fun. If this is done, would the Oly*fun from a metallic bolt then be usable as face mask lining? Also, would there be a residual odor from the laminating process after the metallic sheet is removed that would affect the usability?

    1. Robin Dann says:

      Oly-fun metallic should not be used to cover the face or head. The Metallic laminated coating will make it difficult to breathe.
      Even if you remove the coating, the lamination process may have altered the nonwoven material. We would not recommend using the Oly*fun Metallic for face masks

      **Please note, homemade masks are not a substitute or replacement for N95 medical equipment.**

      Oly*fun has not been tested or approved for medical use or filtration capabilities. Its effectiveness as a germ barrier is unknown.

  26. Carol says:

    Do you have any plans to test Oly-fun to determine its:
    medical use or filtration capabilities. Its effectiveness as a germ barrier is unknown.It has also not been laboratory tested for its ability to be sterilized.

    1. Robin Dann says:

      Yes, we are looking into having testing done.
      Unfortunately, there are a variety of tests to be run and the process is not something that can be done quickly.

      Any test results and safety certifications will be included in our product descriptions.

      **Please note, homemade masks are not a substitute or replacement for N95 medical equipment.**

      Oly*fun has not been tested or approved for medical use or filtration capabilities. Its effectiveness as a germ barrier is unknown. It has also not been laboratory tested for its ability to be sterilized.

  27. April Perry says:

    Another crafter brought up a concern in one of the groups I am in. She stated… “the concern with the Oly Fun is inhaling microplastics from cut pieces in the fabric. Manufactured masks are sealed.”

    Is there a concern that by cutting the oly-fun you could then expose the wearer of a mask to inhale particles from it?

    1. Robin Dann says:

      Oly*fun has not been tested or approved for medical use or filtration capabilities. Its effectiveness as a germ barrier is unknown. This would also be the case in regard to your question about the inhalation of microplastics.

      **Please note, homemade masks are not a substitute or replacement for N95 medical equipment.**

  28. Connie Gereffi says:

    On the use of this as a filter, the specs show it is not acid free. Is this harmful to breath into the lungs?

    1. Robin Dann says:

      Hi Connie,
      Oly*fun has not been tested or approved for medical use or filtration capabilities. Its effectiveness as a germ barrier is unknown.
      Oly*fun is a 100% Polypropylene non-woven material, we do not have any in regard to the acidity of the material.

      **Please note, homemade masks are not a substitute or replacement for N95 medical equipment.**

  29. Savina O. Schoenhofer says:

    How about microwaving masks with Oly*fun?

    1. Robin Dann says:

      We have been provided a lot of information from people who are using Oly*fun. Perhaps the information you will find the information below from the Denver Mask Task Force in regard to the cleaning of Oly*fun to be helpful.

      **Please note, homemade masks are not a substitute or replacement for N95 medical equipment.**

      Oly*fun has not been tested or approved for medical use or filtration capabilities. Its effectiveness as a germ barrier is unknown.It has also not been laboratory tested for its ability to be sterilized.

      Washing/Sterilizing Instructions

      Autoclave Sterilization: The melting point for our polypropylene filter is 320°F. The standard operating temperature for Heat Autoclaves is 250°F. We recommend masks be double bagged, freestanding on a stainless tray with minimal water added. If your mask includes elastic straps, they may not withstand autoclave sterilization. The WHO recommends heating to greater than 212°F for 2 min.

      Home Sterilizing Instructions:
      Oly-fun filter material should not be soaked long term in water. You can wash gently and air dry. The preferred method to sterilize them is to put them inside a freezer-weight Ziploc and drop them in a pot of boiling water for 15+ minutes.​ ​Instapot instructs to place items in silicone/metal steamer, on steam function with 750ml water. Newer models have dedicated sanitize button.

      Home Washing Instructions (for personal use)
      Gentle Wash & Air Dry – in this case, soap rather than heat is used to remove the virus from the fabric.

      ***This information has been shared with us by an outside source. Fairfield Processing cannot speak to the accuracy of information or claims provided by outside organizations and individuals.***

  30. JTZ says:

    you said two layers of oly fun as a filter would be good. could I make the whole mask out of two layers of oly fun and skip the cotton outer layers?
    thanks!

    1. Robin Dann says:

      Yes, we have heard of people using two layers of Oly-fun for single-use masks.
      The benefit of the outer cover is that it can be tossed in the washer for cleaning and a new Olyfun filter can be inserted.

      If you are using an Olyfun only mask more than once we suggest you follow sterilization suggestions of the Denver Mask Task Force in between uses.

      We have been provided a lot of information from people who are using Oly*fun. Perhaps the information you will find the information below from the Denver Mask Task Force in regard to the cleaning of Oly*fun to be helpful.

      **Please note, homemade masks are not a substitute or replacement for N95 medical equipment.**

      Oly*fun has not been tested or approved for medical use or filtration capabilities. Its effectiveness as a germ barrier is unknown.It has also not been laboratory tested for its ability to be sterilized.

      Washing/Sterilizing Instructions

      Autoclave Sterilization: The melting point for our polypropylene filter is 320°F. The standard operating temperature for Heat Autoclaves is 250°F. We recommend masks be double bagged, freestanding on a stainless tray with minimal water added. If your mask includes elastic straps, they may not withstand autoclave sterilization. The WHO recommends heating to greater than 212°F for 2 min.

      Home Sterilizing Instructions:
      Oly-fun filter material should not be soaked long term in water. You can wash gently and air dry. The preferred method to sterilize them is to put them inside a freezer-weight Ziploc and drop them in a pot of boiling water for 15+ minutes.​ ​Instapot instructs to place items in silicone/metal steamer, on steam function with 750ml water. Newer models have dedicated sanitize button.

      Home Washing Instructions (for personal use)
      Gentle Wash & Air Dry – in this case, soap rather than heat is used to remove the virus from the fabric.

      ***This information has been shared with us by an outside source. Fairfield Processing cannot speak to the accuracy of information or claims provided by outside organizations and individuals.***

  31. JTZ says:

    is oly*fun spun bond?

    1. Robin Dann says:

      Hello JTZ,
      I have unfortunately not able to obtain an answer to this question.
      The term spun-bond does apply to many non-wovens, but I am not seeing it in any of our Oly*fun documentation.

      Is there a specific reason you are looking for or to avoid Spun bond?
      Perhaps I can help by looking for answer you need from a different angle?

  32. Maria says:

    The Denver mask task force tested the melting point of polypropylene to be 320°f. In an earlier reply, you stated that Oly fun’s melting point was 248°f? Which one,would you say it is? At 248°f, it would not withstand the autoclave at 250°f.

    So you are saying your recommended ways of cleaning are either wiping w lysol or hand washing, correct? How about boiling or steaming?

    1. Robin Dann says:

      Hi Maria, Our Olyfun spec sheet states that the material melts at 21°C (248°F). As Olyfun is primarily used as a craft and decorating material, we have never tested it for sterilization purposes.
      Please note that the information shared by The Denver Mask Task Force has very specific instructions for the preparation of the material prior to the use of an autoclave.

      Fairfield has not tested Oly-fun for sterilization. We are happy to pass along the information shared with us as a courtesy to our customers.
      However, Fairfield Processing cannot speak to the accuracy of information or claims provided by outside organizations and individuals.

      **Please note, homemade masks are not a substitute or replacement for N95 medical equipment.**

      Oly*fun has not been tested or approved for medical use or filtration capabilities. Its effectiveness as a germ barrier is unknown.It has also not been laboratory tested for its ability to be sterilized.

  33. Mel says:

    Hello Robin Dann,

    I just read through this whole thread and wanted to say thank you and that I hope you are well! You’re doing an awesome job with these questions.

    1. Robin Dann says:

      Thank you!
      We are glad you are finding this information helpful.
      Stay well

  34. Tracy Selph says:

    HI! I’m making masks for health care providers and for regular folks who are not working in a sterile environment. I am currently sewing the Deaconess pattern with two layers of OLY as a sewn-in internal filter. As I’m concerned with breathability, would it be OK to use only one layer of OLY for ‘regular’ folks? I understand that there’s been no confirmation of OLY’s filtration abilities, but I’m wondering about just how much more added protection a second layer would offer and is it worth it for the breathability concern? Thanks.

    1. Robin Dann says:

      The CDC recommends wearing cloth face coverings in public settings where other social distancing measures are difficult to maintain (e.g., grocery stores and pharmacies), especially in areas of significant community-based transmission. The CDC is recommending simple coverings using even a tee shirt of bandana when other masks can not be found.

      If you are concerned about the breathability of multiple layers of Oly*fun perhaps try a mask with a pocket to add and remove the Olyfun filter this way you can adjust to your comfort level.

      Click here to see the CDC recommendations for masks

      **Please note, homemade masks are not a substitute or replacement for N95 medical equipment.**

      Oly*fun has not been tested or approved for medical use or filtration capabilities. Its effectiveness as a germ barrier is unknown.

  35. Sharon says:

    I purchased Oly*fun fabric two years ago to make outdoor planters. It worked very well in the heat and sun and with many waterings. I am not sure if this adds anything to the comments on durability, but thought I would let you know.

    1. Robin Dann says:

      Thank you for letting us know how please you are with Oly*fun and that it worked well for your project

  36. Patty Garcy says:

    I am using Oly fun between 2 layers of cotton for face masks. The recommendation I read from CDC was that homemade masks be sanitized/cleaned in 160 degree oven for 20 minutes after use. Can I put my masjs with cotton/Olyfun in the oven as recommended for cleaning?

    1. Robin Dann says:

      We are unaware of any recommendations for sanitizing of masks by putting them in an oven. We would not recommend putting Oly*fun into any type of oven.

      We suggest you follow the sanitization recommendations from the Denver Mask Task Force listed below.

      **Please note, homemade masks are not a substitute or replacement for N95 medical equipment.**

      Oly*fun has not been tested or approved for medical use or filtration capabilities. Its effectiveness as a germ barrier is unknown.It has also not been laboratory tested for its ability to be sterilized.

      Washing/Sterilizing Instructions

      Autoclave Sterilization: The melting point for our polypropylene filter is 320°F. The standard operating temperature for Heat Autoclaves is 250°F. We recommend masks be double bagged, freestanding on a stainless tray with minimal water added. If your mask includes elastic straps, they may not withstand autoclave sterilization. The WHO recommends heating to greater than 212°F for 2 min.

      Home Sterilizing Instructions:
      Oly-fun filter material should not be soaked long term in water. You can wash gently and air dry. The preferred method to sterilize them is to put them inside a freezer-weight Ziploc and drop them in a pot of boiling water for 15+ minutes.​ ​Instapot instructs to place items in silicone/metal steamer, on steam function with 750ml water. Newer models have dedicated sanitize button.

      Home Washing Instructions (for personal use)
      Gentle Wash & Air Dry – in this case, soap rather than heat is used to remove the virus from the fabric.

      ***This information has been shared with us by an outside source. Fairfield Processing cannot speak to the accuracy of information or claims provided by outside organizations and individuals.***

  37. Barbara Johnson says:

    I purchased Oly Fun recently to use as face mask removable filters. I saw comments on metallic. My Oly Fun is “Gold, LFM01, Apr 2020, 80% polypropylene 20% polyester.” It is shiny and now I assume it is “metallic”. Am I correct? It also has an odor. I hand washed and then put the 3 cut filter pieces in the dryer on low for 20 minutes. One separated, one partially separated, and the other stayed in tack. The odor remained. As you state it should not be used on the face or head. I’m so disappointed!

    1. Robin Dann says:

      The Olyfun that you purchased is one of our Metallic colors, which unfortunately is not suitable for use in covering the face or head.
      The smell you are noticing may be the glue from the lamination.

      We recommend spot cleaning for Oly-fun Metallic materials as long term exposure to water will soften the laminating adhesive and cause the metallic sheeting to separate.
      Although the product may then look like regular Oly-fun, there may still be a lamination residue on it that would still make the material unacceptable for use in covering the head or face.

  38. Kristin says:

    In regards to whether or not Oly Fun is spun bonded… I downloaded and read through this over the weekend after stumbling upon it when researching the use of polypropylene in masks. Perhaps this is why they were looking for clarification? This is the link for the pdf of this study http://nap.edu/11637 Reusability of Facemasks During an Influenza Pandemic:Facing the Flu (2006)

    1. Robin Dann says:

      Thank you for sharing this information.

  39. Donna Fernsten says:

    I know this product is in short supply and I am unable to find it in California or anywhere for that matter. I have an immune compromised child and was hoping to find some. Can you update me on any availability?

    1. Robin Dann says:

      We are working on replenishing our inventory, but this could take several weeks. You may try Walmart.com or any Walmart store with a sewing department. Also once they are reopened, Hobby Lobby carries Oly*fun as well.

      Thank you for your patience as work to replenish our inventory.

      We suggest you follow the sanitization recommendations from the Denver Mask Task Force listed below.

      **Please note, homemade masks are not a substitute or replacement for N95 medical equipment.**

      Oly*fun has not been tested or approved for medical use or filtration capabilities. Its effectiveness as a germ barrier is unknown.It has also not been laboratory tested for its ability to be sterilized. Oly*fun Metallic materials can NOT be sued for face or head coverings.

      Washing/Sterilizing Instructions

      Autoclave Sterilization: The melting point for our polypropylene filter is 320°F. The standard operating temperature for Heat Autoclaves is 250°F. We recommend masks be double bagged, freestanding on a stainless tray with minimal water added. If your mask includes elastic straps, they may not withstand autoclave sterilization. The WHO recommends heating to greater than 212°F for 2 min.

      Home Sterilizing Instructions:
      Oly-fun filter material should not be soaked long term in water. You can wash gently and air dry. The preferred method to sterilize them is to put them inside a freezer-weight Ziploc and drop them in a pot of boiling water for 15+ minutes.​ ​Instapot instructs to place items in silicone/metal steamer, on steam function with 750ml water. Newer models have dedicated sanitize button.

      Home Washing Instructions (for personal use)
      Gentle Wash & Air Dry – in this case, soap rather than heat is used to remove the virus from the fabric.

      ***This information has been shared with us by an outside source. Fairfield Processing cannot speak to the accuracy of information or claims provided by outside organizations and individuals.***

  40. Cindy says:

    I read here that you do not suggest Oly-Fun be machine washed and dried, but in another section of your site, you say that it can be washed on gentle cycle but air dried. So can I assume it can be machine washed and air dried?

    1. Robin Dann says:

      For its use as a craft material, we recommend spot cleaning of Oly*fun. We have learned from the Denver Mask Task Force and others who are using Oly*fun in making face masks, that they have successfully washed it several times.

      We suggest you follow the sanitization recommendations from the Denver Mask Task Force listed below.

      **Please note, homemade masks are not a substitute or replacement for N95 medical equipment.**

      Oly*fun has not been tested or approved for medical use or filtration capabilities. Its effectiveness as a germ barrier is unknown.It has also not been laboratory tested for its ability to be sterilized. Oly*fun Metallic materials can NOT be sued for face or head coverings.

      Washing/Sterilizing Instructions

      Autoclave Sterilization: The melting point for our polypropylene filter is 320°F. The standard operating temperature for Heat Autoclaves is 250°F. We recommend masks be double bagged, freestanding on a stainless tray with minimal water added. If your mask includes elastic straps, they may not withstand autoclave sterilization. The WHO recommends heating to greater than 212°F for 2 min.

      Home Sterilizing Instructions:
      Oly-fun filter material should not be soaked long term in water. You can wash gently and air dry. The preferred method to sterilize them is to put them inside a freezer-weight Ziploc and drop them in a pot of boiling water for 15+ minutes.​ ​Instapot instructs to place items in silicone/metal steamer, on steam function with 750ml water. Newer models have dedicated sanitize button.

      Home Washing Instructions (for personal use)
      Gentle Wash & Air Dry – in this case, soap rather than heat is used to remove the virus from the fabric.

      ***This information has been shared with us by an outside source. Fairfield Processing cannot speak to the accuracy of information or claims provided by outside organizations and individuals.***

  41. Kathy Holiday says:

    Ok I am making fave mask with a 8 x 8 pieces of 100% cotton and same size as oly fun. Not as a filtration and I have told people to spot clean only no washer and dryer and no microwave. Will the oly fun be safe for those wearing the mask? Or should I be putting anothe piece of cotton over the oly fun that is against the face?

    1. Robin Dann says:

      Many people are making disposable masks using multiple layers of Olyfun. So it can go against the face, however, you may find cotton to be a bit softer.

      Cotton masks with a pocket for a removable Oly*fun filter offer the ability to wash and sanitize your mask and only need to replace the filter.

      We suggest you follow the sanitization recommendations from the Denver Mask Task Force listed below.

      **Please note, homemade masks are not a substitute or replacement for N95 medical equipment.**

      Oly*fun has not been tested or approved for medical use or filtration capabilities. Its effectiveness as a germ barrier is unknown.It has also not been laboratory tested for its ability to be sterilized. Oly*fun Metallic materials can NOT be sued for face or head coverings.

      Washing/Sterilizing Instructions

      Autoclave Sterilization: The melting point for our polypropylene filter is 320°F. The standard operating temperature for Heat Autoclaves is 250°F. We recommend masks be double bagged, freestanding on a stainless tray with minimal water added. If your mask includes elastic straps, they may not withstand autoclave sterilization. The WHO recommends heating to greater than 212°F for 2 min.

      Home Sterilizing Instructions:
      Oly-fun filter material should not be soaked long term in water. You can wash gently and air dry. The preferred method to sterilize them is to put them inside a freezer-weight Ziploc and drop them in a pot of boiling water for 15+ minutes.​ ​Instapot instructs to place items in silicone/metal steamer, on steam function with 750ml water. Newer models have dedicated sanitize button.

      Home Washing Instructions (for personal use)
      Gentle Wash & Air Dry – in this case, soap rather than heat is used to remove the virus from the fabric.

      ***This information has been shared with us by an outside source. Fairfield Processing cannot speak to the accuracy of information or claims provided by outside organizations and individuals.***

  42. Kathy Holiday says:

    I am using it as a filtration sorry

    1. Robin Dann says:

      thanks for the clarification. Please refer to earlier instructions;

  43. Ivy M. says:

    Hi, Robin Dann,
    You deserve some kind of medal for moderating this thread—thank you for all the great information! It answered all the questions I had (one of which was “Is anyone else using Oly*fun for masks?” Ha!). Thanks again!

    1. Robin Dann says:

      Thank you, I’m glad we were able to provide the answers to your questions. Stay safe.

      Please note that homemade masks are not a substitute or replacement for N95 medical equipment.

      Oly*fun has not been tested or approved for medical use or filtration capabilities. Its effectiveness as a germ barrier is unknown. It has also not been laboratory tested for its ability to be sterilized. Oly*fun Metallic materials can NOT be used for face or head coverings.

  44. Ashley says:

    Hello, I understand washing and drying can break down the material in time but will it last longer if I just wash it on gentle cycle and let it air dry? Also, is one water temperature better than another?

    1. Robin Dann says:

      According to the Denver Mask Taskforce, the best method of home sanitation for PP Nonwoven materials (Oly*fun) is as follows.

      Home Sterilizing Instructions:
      Oly-fun filter material should not be soaked long term in water. You can wash gently and air dry. The preferred method to sterilize them is to put them inside a freezer-weight Ziploc and drop them in a pot of boiling water for 15+ minutes.​ ​Instapot instructs to place items in silicone/metal steamer, on steam function with 750ml water. Newer models have dedicated sanitize button.

      Home Washing Instructions (for personal use)
      Gentle Wash & Air Dry – in this case, soap rather than heat is used to remove the virus from the fabric.

      ***This information has been shared with us by an outside source. Fairfield Processing cannot speak to the accuracy of information or claims provided by outside organizations and individuals.***
      **Please note, homemade masks are not a substitute or replacement for N95 medical equipment.**

      Oly*fun has not been tested or approved for medical use or filtration capabilities. Its effectiveness as a germ barrier is unknown.It has also not been laboratory tested for its ability to be sterilized. Oly*fun Metallic materials can NOT be used for face or head coverings.

  45. Margaret Smith says:

    Why can’t I just soak the removable filter in my homemade mask in a small amount of alcohol,or hydrogen peroxide solution, then let it dry on a clean towel while the cotton masks get washed and dried? It seems to me avoiding the agitation from a washing machine would prolong the life of the filter. I have made about 20 using HEPA vacuum bags, cut to size and zigzagged around the outer edge to keep the multiple bag layers as intact as possible.

    1. Robin Dann says:

      We can not speak to the best solution for cleaning filters made with HEPA vacuum bags.

      However, when using our Oly*fun non-woven material for masks or as filters within homemade reusable masks we suggest following the washing instructions provided by the Denver Mask Task Force listed below.

      According to the Denver Mask Taskforce, the best method of home sanitation for PP Nonwoven materials (Oly*fun) is as follows.

      Home Sterilizing Instructions:
      Oly-fun filter material should not be soaked long term in water. You can wash gently and air dry. The preferred method to sterilize them is to put them inside a freezer-weight Ziploc and drop them in a pot of boiling water for 15+ minutes.​ ​Instapot instructs to place items in silicone/metal steamer, on steam function with 750ml water. Newer models have dedicated sanitize button.

      Home Washing Instructions (for personal use)
      Gentle Wash & Air Dry – in this case, soap rather than heat is used to remove the virus from the fabric.

      ***This information has been shared with us by an outside source. Fairfield Processing cannot speak to the accuracy of information or claims provided by outside organizations and individuals.***
      **Please note, homemade masks are not a substitute or replacement for N95 medical equipment.**

      Oly*fun has not been tested or approved for medical use or filtration capabilities. Its effectiveness as a germ barrier is unknown.It has also not been laboratory tested for its ability to be sterilized. Oly*fun Metallic materials can NOT be used for face or head coverings.

  46. Veronica says:

    So like with fabric, should Oly*Fun be washed, rinsed before using them in a face mask?
    Also, do the colors bleed into the fabrics one uses to make the masks?
    Thank you!
    Veronica

    1. Robin Dann says:

      Oly*fun is different than traditional fabric in that it is a Polypropylene non-woven material. The color goes through it 100%. the color will not bleed, in that it is part of the Polypropylene.

      We recommend spot cleaning for Oly*fun. We have heard from many users that they have successfully machine washed and dried their Ol*fun.

      According to the Denver Mask Taskforce, the best method of home sanitation for PP Nonwoven materials (Oly*fun) is as follows.

      Home Sterilizing Instructions:
      Oly-fun filter material should not be soaked long term in water. You can wash gently and air dry. The preferred method to sterilize them is to put them inside a freezer-weight Ziploc and drop them in a pot of boiling water for 15+ minutes.​ ​Instapot instructs to place items in silicone/metal steamer, on steam function with 750ml water. Newer models have dedicated sanitize button.

      Home Washing Instructions (for personal use)
      Gentle Wash & Air Dry – in this case, soap rather than heat is used to remove the virus from the fabric.

      ***This information has been shared with us by an outside source. Fairfield Processing cannot speak to the accuracy of information or claims provided by outside organizations and individuals.***
      **Please note, homemade masks are not a substitute or replacement for N95 medical equipment.**

      Oly*fun has not been tested or approved for medical use or filtration capabilities. Its effectiveness as a germ barrier is unknown.It has also not been laboratory tested for its ability to be sterilized. Oly*fun Metallic materials can NOT be used for face or head coverings.

  47. My says:

    Hi, do you remove the metallic/shiny part to use Olyfun as a filter for facemasks? I think I prefer to insert it to a mask pocket rather than sewing it into an interface for a face mask.

    1. Robin Dann says:

      It sounds like you purchased Oly*fu Metallic materials which can NOT be used for face or head coverings.

  48. Melissa says:

    Hi. Thanks for the info and the links you’ve provided. Just want to be clear on whether Oly-fun is hydrophobic or hydrophilic?

    1. Robin Dann says:

      Oly-Fun would be classified as Hydrophobic.

  49. Barbara Plimpton says:

    Are Whole Foods shopping bags which say they are good for up to 125 machine washings made of Oly-Fun or an equivalent? I know you can’t speak for a product not made by you, but I wonder if you can report anything enlightening that might help me know what to do when I can’t get out to buy Oly-Fin. Thank you so much!

    1. Robin Dann says:

      Hi Barbara,
      Without knowing exactly what material the wholeFoods shopping bags are made from, it is hard to provide you with information on walkability.
      There are many different types and weights of non-woven materials. Before cutting up a shopping bag to use for masks or filters, please check to see if the material has been treated with any chemicals that may be harmful when breathing.

      We do anticipate having Oly*fun back in stock very soon. We will post a message on our blog and website as soon as the new inventory is ready to be sold.

      **Please note, homemade masks are not a substitute or replacement for N95 medical equipment.**

      Oly*fun has not been tested or approved for medical use or filtration capabilities. Its effectiveness as a germ barrier is unknown. It has also not been laboratory tested for its ability to be sterilized. Oly*fun Metallic materials can NOT be used for face or head coverings.

  50. Roberta P Gabaldon says:

    You continue to reply that “Oly Fun has not been tested or approved for medical use or filtration capabilities”. When will this be done? My concern right now is I purchased many sheets to use as DYI masks and need to know if chemically is it safe to breathe through and wash and dry in a domestic dryer?

    1. Robin Dann says:

      This type of testing can take a bit of time.
      At this time we do not have any additional information in regarding the chemical makeup or filtration capabilities of Oly*fun

      We recommend that you hand wash and line dry Oly*fun to protect the integrity and life of the material.

      **Please note, homemade masks are not a substitute or replacement for N95 medical equipment.**

      Oly*fun has not been tested or approved for medical use or filtration capabilities. Its effectiveness as a germ barrier is unknown. It has also not been laboratory tested for its ability to be sterilized. Oly*fun Metallic materials can NOT be used for face or head coverings.

  51. Julie Zucker says:

    Hi! The pattern I’m using (doctor developed) recommends ironing the Oly Fun to the cotton fabric. Do you have a recommendation for what temperature the iron should be set at to fuse to the fabric?

    1. Robin Dann says:

      Oly*fun will melt if you iron it.
      We have had good results with steaming the material to remove any wrinkles that may have occurred in packaging and shipping.

      **Please note, homemade masks are not a substitute or replacement for N95 medical equipment.**

      Oly*fun has not been tested or approved for medical use or filtration capabilities. Its effectiveness as a germ barrier is unknown. It has also not been laboratory tested for its ability to be sterilized. Oly*fun Metallic materials can NOT be used for face or head coverings.

  52. Deb says:

    This is all wonderful info — thank you for sharing!

    I am not a healthcare worker, but my understanding is that fabric can be left in a bag for a few days to allow any virus particles to naturally die.

    I plan to make a fitted (nose clip style) cotton mask with a pocket for a double-layer Oly*fun filter. I will then cut several sets of double-layer filters to have on hand. After wearing the mask, I will place the filter in a bag and leave it alone for a week. The cotton mask can be washed and dried, and worn as soon as the next day with a new filter.

    As to concerns of possibly inhaling teeny particles from the cut edge of Oly*fun, a quick vacuuming after cutting should eliminate any loose bits.

    1. Robin Dann says:

      Hi Deb,
      In regard to loose particles. As Oly*fun does not fray, you will not experience loose particles as you do with cotton cloth or paper filter material.

      In regard to sanitization, we recommend that you follow the washing instructions that were shared with us from the Denver Mask Taskforce to assure safe cleaning of your Oly*fun Masks or filters.

      According to the Denver Mask Taskforce, the best method of home sanitation for PP Nonwoven materials (Oly*fun) is as follows.

      Home Sterilizing Instructions:
      Oly-fun filter material should not be soaked long term in water. You can wash gently and air dry. The preferred method to sterilize them is to put them inside a freezer-weight Ziploc and drop them in a pot of boiling water for 15+ minutes.​ ​Instapot instructs to place items in silicone/metal steamer, on steam function with 750ml water. Newer models have dedicated sanitize button.

      Home Washing Instructions (for personal use)
      Gentle Wash & Air Dry – in this case, soap rather than heat is used to remove the virus from the fabric.

      ***This information has been shared with us by an outside source. Fairfield Processing cannot speak to the accuracy of information or claims provided by outside organizations and individuals.***
      **Please note, homemade masks are not a substitute or replacement for N95 medical equipment.**

      Oly*fun has not been tested or approved for medical use or filtration capabilities. Its effectiveness as a germ barrier is unknown.It has also not been laboratory tested for its ability to be sterilized. Oly*fun Metallic materials can NOT be used for face or head coverings.

  53. Maggie says:

    Please engage in testing of Oly Fun for Covid-19 particle-size filtration. It would be very helpful! My son & I are making shaped Oly Fun masks based on one he received in a Taiwanese hospital a few years ago, adding a nose wire pocket and welding the front seam with the point of an iron to avoid stitching holes there.

    1. Robin Dann says:

      Thank you for your inquiry.
      We will be sure to add updates to our website regarding any testing of Oly*fun, once available.
      Thank you.

  54. Julia Challinor says:

    My question re: Oly-fun is about the reusable shopping bags sold in some grocery stores. Do you know if the stores have printed designs on them, are they still safe to breath through as a lining or filter?
    Learned about Oly-fun watching the excellent videos from The Fabric Patch in WA State re: mask making (to which you helpfully embeded the link) I have been following each successive video, as each has new and more useful information as they continue to learn more and share new tips on materials, construction, techniques as they go. The quilt shop owner and her staff have answered countless questions via email & phone calls (surely an exhausting task) The new videos attempt to answer the most common questions they’ve received.
    Fyi:
    If anyone reading this has used their early videos as a guide, they are now using a new pattern that allows for a more customized fit. They dropped a new video this week 5/13/2020 which includes additional sizes for the “Jesse” mask pattern that they featured in the previous video #3. Links to the excellent free download printable pattern.
    Hope this info is useful. I look forward to your response.

    1. Robin Dann says:

      Thank you for the additional information about the Fabric Patch’s updated video.you can see their latest video by clicking here.

      In regard to your question about grocery bags, unfortunately, we can’t provide much information.
      There are many different types of non-woven materials on the market. As we do not know specifically what was used to make the bags, or have any information as to the chemical make up of the inks used in printing, we really can not provide the answers you are seeking. Perhaps you can contact the sore, or the manufacturer of the bag (there is usually a small tag sewn in or attached to each reusable shopping bag) to inquire as to the specifications of the non-woven material and inks used in their bags.

      The good news is that we will have Oly*fun back in stock very soon.
      Stay tuned.

      ________

      ***This information has been shared with us by an outside source. Fairfield Processing cannot speak to the accuracy of information or claims provided by outside organizations and individuals.***
      **Please note, homemade masks are not a substitute or replacement for N95 medical equipment.**

      Oly*fun has not been tested or approved for medical use or filtration capabilities. Its effectiveness as a germ barrier is unknown.It has also not been laboratory tested for its ability to be sterilized. Oly*fun Metallic materials can NOT be used for face or head coverings.

  55. Cece says:

    So i understand that you dont recomend washing and machine drying the Olyfun but is there any way to clean it? If its not safe to wash it then can it be sprayed with something? Or what is the recommended method of sanitizing the fabric? I also use this fabric to make toddler busy books so ive got a bunch already but if im mistaken about being able to sanitize or clean this fabric somehow then that might be a problem.

    1. Robin Dann says:

      Cleaning Oly*fun
      Information from the Denver Mask Task Force

      Washing/Sterilizing Instructions
      Autoclave Sterilization: The melting point for our polypropylene filter is 320°F. The standard operating temperature for Heat Autoclaves is 250°F. We recommend masks be double bagged, freestanding on a stainless tray with minimal water added. If your mask includes elastic straps, they may not withstand autoclave sterilization. The WHO recommends heating to greater than 212°F for 2 min.
      Home Sterilizing Instructions:
      Oly-fun filter material should not be soaked long term in water. You can wash gently and air dry. The preferred method to sterilize them is to put them inside a freezer-weight Ziploc and drop them in a pot of boiling water for 15+ minutes. Instapot instructs to place items in silicone/metal steamer, on steam function with 750ml water. Newer models have dedicated sanitize button.
      Home Washing Instructions (for personal use)
      Gentle Wash & Air Dry – in this case, soap rather than heat is used to remove the virus from the fabric.
      ***This information has been shared with us by an outside source. Fairfield Processing cannot speak to the accuracy of information or claims provided by outside organizations and individuals. ***
      –––––––––––––
      Washing Polypropylene
      The best way to wash polypropylene fabric is to hand wash it in the sink with antibacterial soap and then allow it to air dry inside and out. You can also wipe your bags down with an antibacterial spray.
      If you do wash your polypropylene material in a washing machine, choose cold or cool water and the delicate cycle, but know that this may shorten the life of the material.
      ***This information has been shared with us by an outside source. Fairfield Processing cannot speak to the accuracy of information or claims provided by outside organizations and individuals. ***

  56. Jane Holcomb says:

    Please, when will we be able to buy this again.

    1. Robin Dann says:

      We anticipate that Oly-fun will be available on our website again in late June or early July.
      Prior to that time, you may wan to check Amazon, Walmart, and Hobby Lobby to see if they have any in stock.

  57. Ymana Johnson says:

    Dear Robin Dann,
    Thank you for the time and effort it takes to address all of these questions and issues. I think I can say that we all really appreciate your diligence and willingness to patiently answer repeatedly. I’ve used Fairfield products for many years in many different applications and I love them all.

    My question: How can I get on a mailing list to know when your supply has been replenished and available for purchase?
    Thanks again

    1. Robin Dann says:

      Ymana, thank you for being a long time Fairfield customer. When you visit our website a box will pop up asking you to sign up for our mailing list. Just fill that in and you will receive updates on new products, sales, special promotions, and restock alerts. if you are having any trouble, please reach out to us at [email protected].

  58. Karen N. says:

    How large should the Oly fun filter be to be put in a pleated mask pocket situated
    at the bottom of the mask. I tried cutting a 4″ by 4″ square but it is difficult to place it in the right position. Is it too small a piece? Do you have any suggestions.

    1. Robin Dann says:

      It is difficult to answer this without seeing the pattern you are using. We have seen people use squares and rectangles of olyfun inside of their cotton pleated masks.
      Personally, I found that it can still move around a bit. If you are wearing the mask for a long period of time, you may want to consider adding 2 small pieces of velcro to hold the filter in place.

  59. Debbie Guillot says:

    Hi–I was told that you can use the metallic oly fun as a mask filter if you remove the metallic layer. Please verify if that is true ASAP. Thank you! (I’m sorry if you addressed this previously.)

    1. Robin Dann says:

      Oly*fun Metallic material should NOT be used for facemasks or head coverings. Even if you remove the metallic film there will still be adhesive residue from the laminating process left on the non-woven material.
      We hope to have regular Oly*fun back in stock very soon on our website. Meanwhile please check your local Walmart or Hobby Lobby to see if they may still have some available.

      Thank you

  60. Gail says:

    I see where online Walmart has a California Prop 65 Warning on Oly-fun. I was planning to put Oly-fun in my face mask as the middle material. Now I’m wondering how safe it would be to be breathing through it?

    1. Robin Dann says:

      We have been made aware that there are some 3rd party vendors who include the Prop 65 warning on their Oly*fun product postings on Walmart.com
      Unfortunately, we have no way of modifying this information. Oly*fun nonwoven material does not require a prop 65 warning.

      That said, please note that Oly*fun has not been tested or approved for medical use or filtration capabilities. Its effectiveness as a germ barrier is unknown. It has also not been laboratory tested for its ability to be sterilized. Oly*fun Metallic materials can NOT be used for face or head coverings.

  61. Cindy S says:

    Is there a difference in the oly fun material if purchased from a bolt (from fabric store), the 12” x 12” craft sheets or the 3 yd bundles.

    1. Robin Dann says:

      It is the same material. We package and sell Oly*fun in a variety of sizes colors, and combinations. This enables you to select the package that best fits your specific project.

  62. Molly A says:

    Hi, I purchased the 12×12 inch Superhero Olyfun online from Walmart and noticed when my shipment arrived that the Olyfun had a strong odor. Is this typical of Olyfun? Is there anything I can do to get rid of the odor? Did I get a bad batch of Olyfun? I was really hoping to make face masks out of these sheets, but the odor is too strong. I felt kind of sick afterwards so I put the Olyfun sheets in the garage to see if the bad smell would go away.

    1. Robin Dann says:

      Oly*fun should not have an odor. Perhaps it had been stored next to something that had an odor.
      We will be in touch with you via email about replacing the product.

  63. Mary says:

    Would you recommend using a UV light on an olyfun mask filter?

    1. Robin Dann says:

      There has been no testing done using a UV light on Oly*fun, so we can not speak to the effectiveness.
      We continue to recommend cleaning oly*fun as per the guidelines provided by the Denver Mask Task Force.

      Washing/Sterilizing Instructions
      Autoclave Sterilization: The melting point for our polypropylene filter is 320°F. The standard operating temperature for Heat Autoclaves is 250°F. We recommend masks be double bagged, freestanding on a stainless tray with minimal water added. If your mask includes elastic straps, they may not withstand autoclave sterilization. The WHO recommends heating to greater than 212°F for 2 min.
      Home Sterilizing Instructions:
      Oly-fun filter material should not be soaked long term in water. You can wash gently and air dry. The preferred method to sterilize them is to put them inside a freezer-weight Ziploc and drop them in a pot of boiling water for 15+ minutes. Instapot instructs to place items in silicone/metal steamer, on steam function with 750ml water. Newer models have dedicated sanitize button.
      Home Washing Instructions (for personal use)
      Gentle Wash & Air Dry – in this case, soap rather than heat is used to remove the virus from the fabric.
      ***This information has been shared with us by an outside source. Fairfield Processing cannot speak to the accuracy of information or claims provided by outside organizations and individuals. ***
      –––––––––––––
      Washing Polypropylene
      The best way to wash polypropylene fabric is to hand wash it in the sink with antibacterial soap and then allow it to air dry inside and out. You can also wipe your bags down with an antibacterial spray.
      If you do wash your polypropylene material in a washing machine, choose cold or cool water and the delicate cycle, but know that this may shorten the life of the material.
      ***This information has been shared with us by an outside source. Fairfield Processing cannot speak to the accuracy of information or claims provided by outside organizations and individuals. ***

  64. Jessica says:

    Robin Dann–You are a treasure and have been brilliant in being helpful while remaining responsibly calm and strict about guidelines. This entire Q&A thread has its own kind of narrative story line — like an archaeological dig through our current panic, with information added and changed, and rephrased and reformatted along the way.

    I purchased some Oly-fun early on when I was still figuring out which masks to make and having tried out countless (13+) patterns, I suspect that I will use the Oly-fun for filters in my two-layer cloth masks when I run out of filter material and then use the rest for some fun, crafty project for which Oly-fun was originally intended. That said, I will keep an eye out if Fairfield ends up getting the material tested.

    Stay safe and well and keep up the good work.

  65. Zella says:

    Does oly fun have any latex in It

    1. Robin Dann says:

      there is no latex in Oly*fun. It is 100% Polypropylene

  66. Cindy S says:

    Should oly fun be sterilized in the ziplock bags before sewing into the finished cotton fabric face mask, or sew it in first and sterilize the entire mask. (My cotton fabric has already been washed a couple of cycles an dried in dryer). Or would it be ok to just sew the oly fun into the cotton mask, gentle hand wash with a dial antibacterial soap before it’s first use and after each time it is worn. Skipping the sterilization. Also how many gentle hand washings of the cotton/oiy fun sewn masks before the oly fun is no longer any good.

    1. Robin Dann says:

      Thank you for your inquiry.

      Oly*fun can be used as a replaceable filter in your cotton masks. It can be sanitized after use or thrown into recycling and a new piece inserted.
      You can also make a mask out of only Oly*fun. We would recommend using at least 2 layers.

      For washing and sanitizing of olyfun we defer to the instructions provided to us by the Denver Mask Task Force.
      “Washing/Sterilizing Instructions
      Autoclave Sterilization: The melting point for our polypropylene filter is 320°F. The standard operating temperature for Heat Autoclaves is 250°F. We recommend masks be double bagged, freestanding on a stainless tray with minimal water added. If your mask includes elastic straps, they may not withstand autoclave sterilization. The WHO recommends heating to greater than 212°F for 2 min.
      Home Sterilizing Instructions:
      Oly-fun filter material should not be soaked long term in water. You can wash gently and air dry. The preferred method to sterilize them is to put them inside a freezer-weight Ziploc and drop them in a pot of boiling water for 15+ minutes. Instapot instructs to place items in silicone/metal steamer, on steam function with 750ml water. Newer models have dedicated sanitize button.
      Home Washing Instructions (for personal use)
      Gentle Wash & Air Dry – in this case, soap rather than heat is used to remove the virus from the fabric.
      ***This information has been shared with us by an outside source. Fairfield Processing cannot speak to the accuracy of information or claims provided by outside organizations and individuals. ***
      –––––––––––––
      Washing Polypropylene
      The best way to wash polypropylene fabric is to hand wash it in the sink with antibacterial soap and then allow it to air dry inside and out. You can also wipe your bags down with an antibacterial spray.
      If you do wash your polypropylene material in a washing machine, choose cold or cool water and the delicate cycle, but know that this may shorten the life of the material.
      ***This information has been shared with us by an outside source. Fairfield Processing cannot speak to the accuracy of information or claims provided by outside organizations and individuals. ***”

  67. Jane Holcomb says:

    Do you have any updates on when you expect to get stock back for sale?

    1. Robin Dann says:

      We are hoping to have our restock to be complete by Mid July. However, shipments of raw materials have been a bit unreliable.
      Please check back in with us in a few weeks.

  68. Cindy S says:

    Hi Robin, So are you saying to use oly fun as replaceable filtering or can it be sewn in to the cotton fabric. I have seen some online posting comments to use as temporary filtering. I found on The Fabric Patch website and the Denver Mask Task Force using the oly fun as sewn into the cotton fabric. That’s why I purchased it. I originally planned on using interfacing as filter. But when I saw oly fun on Fabric Patch I liked that idea thinking it wouldn’t be as hot and more protection than interfacing. I just want to know your opinion on using it as sewn in.
    If sewing into cotton fabric, since I already washed the cotton, I was just wondering if sterilizing can be done after the mask has been sewn. Thanks again

    1. Robin Dann says:

      You certainly can sew Oly*fun into the cotton masks.
      We also have heard from many people who made their entire mask from Oly*fun.

      We recommend hand washing or spot cleaning Oly*fun (which is why we suggest the removable filter option) but we know that people have very successfully washed their Oly*fun/cotton combo masks without incident.

      We do not recommend machine drying oly*fun

  69. Ulrike says:

    I found your site after reading the NPR article someone else linked above. I appreciate you taking the time to post this info and responding to so many comments.

  70. Anna S says:

    Hi
    I’m delighted that there’s no formaldehyde- but what about other VOCs which might outgas / off gas? If it doesn’t have any, that would be fabulous news. If it does, could you tell me which ones?

    I’m working with someone who is doing filtration and breathability testing, on an ad hoc but very systematic basis and also trying to find out about VOCs for all well performing materials.

    Many thanks,

    1. Robin Dann says:

      Unfortunately, we do not have any information on off-gas from Oly*fun.
      As you may be aware, we have sent the product off to a lab for testing.
      However, the labs are very backed up and it may 2 months before we have any results.

      We would love to hear the results of your independent filtration and breathability tests when you have them available.

  71. Amanda says:

    Thank you soooo much for all these super helpful replies!

    Could you please let me know in which country or countries the Oly-Fun is currently manufactured?

    Thank you again! Amnada

    1. Robin Dann says:

      This product is currently manufactured in China.

  72. MELANIA says:

    Do you know when you will have supply available again?

    1. Robin Dann says:

      Unfortunately, the high demand for this product by wholesale customers has caused a delay in availability for inventory for fairfieldworld.com

      You should be able to find Oly*fun online at Walmart.com and Joann.com within the next few weeks and in HobbyLobby, Walmart and Michaels stores soon.

      thank you for your patience.

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