The Skullerz 8810F(x)-CASE Contoured Face Cover Mask Replacement Filters are compatible with the Skullerz 8802F(x) Contoured Face Cover Mask for enhanced filtration. These 3-layer poly cotton filters are not Reusable and should be properly disposed of after each use. Ergodyne 190-Pack Disposable Cotton Polyester Blend Not Rated Large/X Large All- Purpose Face Mask in White | 48874