These face masks from Pistol Lake are made of 100% pre-shrunk 6.5oz cotton twill. Two-ply, because you wouldn't use one-ply on your bum, so you shouldn't use it on your face. Fabric ties ensure maximum comfort and durability compared to elastic bands. Adjustable metal nose bar will fit snugly on anyone's face and prevent your glasses from fogging.
Wash hot, tumble dry low (or hang dry).
For best results, tie the top at the back of the crown of your head. Keep that one tied. Double knot for convenience. Adjust the nose, and then tie the bottom. Great coverage, and you'll only need to untie the bottom to get it on or off.
Not medical grade. Super fashionable, though.