This listing is for a one-size adult Olson cloth face mask. This mask is made from the Olson pattern recommended and distributed by hospitals. It has a pocket for a filter. This mask also features adjustable behind-the-head cording. Both layers of this mask are 100% cotton.
Cloth face masks are not be intended to replace medical grade equipment. They are not approved by the FDA for any sort of protection against anything. The CDC and the FDA are NOT on the same page about this, so please keep that in mind. The CDC, and several other agencies, are pushing for cloth masks because they are absolutely better than nothing (studies showing at least 40% better than nothing). Again, for those in the back: Cloth Masks are not guaranteed protection against ANYTHING.