Similar to a 3-ply disposable mask, our filters are (3) layers thick. Top and bottom layers are both made from non-woven polypropylene fabric. The inner layer is made from SMS (spunbound meltblown spunbound). Adding a filter to your fabric mask will increase particulate filtration and therefore enhance the effectiveness of your fabric mask.
Do not wash. Remove from fabric mask before washing. Filters are not washable and should be replaced every 7 days.
Non-woven polypropylene, SMS (spunbound meltblown spunbound)
These filters are NOT a direct substitute for N95, KN95, surgical, or procedural masks and are NOT FDA approved. This is a personal, civilian use item. Due to the intimate nature of this product, intended for use during a high risk time for the prevention of viral spread, these filters are non-returnable and non-refundable. All sales are therefore, final.