WOLFBIKE Super Anti Dust Cycling Face Mask Filter Mouth-Muffle Mask Motorcycle Bicycle Racing Snowboarding Sports Half Face Cover Protection - Black Face Shape Design, Nose portion of an aluminum sheet secured to prevent slipping Suitable for doing activities like biking, riding, snowboarding, or climbing With activated charcoal filter, filters out exhaust emissions Removable Carbon Filter, Adjustable Elastic Strap, Velcro Fastening Ventilation Holes on Mouth, Soft and comfortable to wear. Material: NEOPRENE, Weight: 50g