These three-layer face masks are created using 100% cotton muslin fabric. Muslin is a tightly woven cotton material that is lightweight, soft and breathable. They are washable and re-wearable and includes a filter pocket inside. These are not medical grade masks. Comes in a sealed plastic bag with care instructions. 4" Tall x 3.25" (6.5" open) Long * Ethically made by women artisans in Thailand Please be advised that our non-medical masks do not guarantee full protection against COVID-19. THESE ARE FINAL SALE.