Rectangle Adult Fabric Face Mask,100% Washable silk, 2 layers of silk fabric, with an opening to put in a filter. It's a Reusable face mask, Dust mask, with Elastic Straps to go over the ears. This mask is easy to use. It also has folds allowing the mask to enlarge. The mask covers the nose and chin. The Face Mask is not a medical-grade. We cannot make medical or health claims.