Team Edward Sublimation Face Mask with 2 x PM2.5 Filters There is a pouch for the filter 100% polyester but a cotton inner for comfort. The mask itself is washable and reusable, filters not reusable. Elastic ear loops for a tight fitYou will receive two plastic bits to allow you to adjust the ear loops for a better fit. You thread the elastic through the plastic bits, think of a drawstring and you will get the idea PLEASE NOTE THESE ARE NOT MEDICAL MASKS AND SHOULD NOT BE USED AS AN ALTERNTIVE TO A MEDICAL MASK