✓? FITS MOST Adults - We made are ? 20 larger than most other brands to make sure it fits all Sizes. ✓? HANDMADE – These covers are custom Handmade by our Staff Family to meet your demand. We're working hard every day to make sure you get the best product. ✓? COMFORT for Adults TEENS – US Size: M L – our young adult size ? is with remarkably comfortable elastic band that stretches upwith the 4th layer being an empty slot for carbon Filters. We recommend the for to filter small particles in the air. ✓? MUTLIPURPOSE ? REUSABLE – Great for Both in-door and outdoor use. Our covers has maximum of 4 layer coverage. Outer layer being 100 cotton with 2 layers of Muslin inside with the 4th layer being an empty slot for carbon Filters. We recommend the for to filter small particles in the air. ✓? BETTER CHOICE - 30 more effective compared to other cotton base cloth with double inner Muslin threads. ?Up To 100x Washable.