Termin8 Adult Face Mask The Grinch. The washable face mask fits snugly around the face to prevent particles and harmful substances from entering your nose and mouth. It has a replaceable activated charcoal filter design (mask+ filter = double filtration). The washable fashion face mask is designed to be re-usable and will filter out a minimum of 95% of particles when used in conjunction with PM2.5 Filters Note: The Washable Face Mask holds 1 PM2.5 Filter (Filter Not Included)