The Pacsafe Silver ion Face Mask is a reusable and washable mask that provides at least 99% filtration efficiency against microbials and airborne particles down to 2.5 microns (PM2.5), with a silver ion fabric that effectively disinfects and reduces microbes. Material: Silver ion cotton (main material) Modal graphene cotton (lining)

Measurements:(From chest to eyes)

Small: 7.5 - 9.8 cm
Medium: 19.8 - 10.5 cm
Large: 10.5 - 12.2 cm