This mask features 2-ply premium grade cotton and polyester. Adjustable ear loops with toggles to fit all sizes. Insert pocket for compatible filter. Includes 1 PM 2.5 filter. Care Instructions: Wash Before First Use - Machine Wash Cold with Like Colors - Air Dry - Iron if Needed. Remove filter before washing. Replace filter if damaged or breathing becomes difficult. For each mask sold one is donated. Masks are made in the USA. This one says, "Born to be Wild". Not intended for medical grade use.