Elm Reusable Face mask in a black fabric comes with a matching fabric bag to keep clean while in your bag or car. Adjustable toggles on the elastic ear strap so you get a firm fit reducing the need to touch your mask. Each mask can be fitted with a disposable activated carbon filter (PM2.5) each mask comes with two of these filters. The masks can be used with or without the filter and the filter should be removed before handwashing the mask. construction is 3 layers of woven 100% cotton.