Activated Charcoal Filter Face Mask with Soft Cloth for Cycling Runing MTB Outdoor Sports OW83 Mask made of NEOPRENE with activated charcoal filter, keeping out exhaust emissions, dustproof. Face Shape Design, Nose portion of an aluminum sheet secured to prevent slipping Ventilation Holes in mouth part , Soft and comfortable to wear. Size: one size fit for most men and women Suitable for doing activities like biking, riding, snowboarding, or climbing