Shark Adult Face Mask. This mask comes with one replaceable PM2.5 filter. The material is made with light and stretchy polyester fabric that contours the mask to the shape of your face. This mask is reusable and can be hand washed with a little detergent and water. Masks are final sale. Not medical grade and should not replace coomon sense guidelines for avoiding covid 19. Wash your hands, don't touch your face, wear a mask, and practice social distancing.