Replacement Filters

Replacement Filters







100% Polypropylene Filter Liner

-Inserts Easily into the pocket of a fabric made face mask

-1 order includes 5 pieces for $3.00

-This order is for the throw away filters ONLY, the face mask is not included

*These liners are not presumed to be 100% effective in filtering germs, they are merely an extra measure to help slow the spread of germs

*When face masks are purchased from this shop, they are already interlined with a piece of the polypropylene liner. However, constant washing of the face mask can slowly compromise the liner, so adding the throw away liner is only an extra precaution.

  • Return Policy

    Flatten The Curve Gear would like you to be completely satisfied with your purchase. Your happiness is our highest priority. Regrettably, we cannot offer a refund or exchange once the product has been opened and used unless the product is faulty or defective.

    Because of the nature of this product, we can accept returns for damaged or defective goods only. These returns must be made within 7 days of your receipt of the product. 

    If you feel you have received a faulty or defective product, please email us at for further instructions.

    Only products purchased on may be returned for a refund or exchange. We cannot accept items purchased from another source for an exchange or refund. We also cannot accept products damaged while opening a package for refund or exchange (i.e. cut with scissors, knife, or torn apart). Products which are not eligible for return or exchange will not be returned to sender and will not be eligible for credit. Costs to return items to Flatten The Curve Gear are the responsibility of the customer.

  • Shipping Policy

    All items in ordered will be shipped within 3-5 business days via USPS with tracking. When your item is picked and packaged for shipping, you will receive an email notification with tracking information.


Made in and shipped from
Meridian, ID, USA

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