OppoSuits Face Masks are made from leftover stock fabric. This way we make sure as little fabric as possible goes to waste. The shell fabric is made out of 100% polyester while the inner lining is made from 100% cotton for extra comfort. All of our face masks have elastic earloops which are equipped with adjustable and removable clips so they will make for a perfect fit. Please note that while our face masks do look very cool, they are non-medical and therefore offer no protection for yourself. Also, due to safety and sanitary reasons we do not accept any returns on these products.