Instructions: Multi Purpose, Can Be Used As Headscarf, Mask, Wrist Guard, Bib, Hair Band, Headband, Pirate Hat, Mask, Riding Mask, Etc Material description: 100% polyester fiber (polyester), protective 5-layer activated carbon filter, M-shaped nose clip. Applicable scenarios: Suitable for cycling, camping, running, traveling, climbing and daily use. Note: (non-medical mask) Product performance: Very soft, breathable, water-repellent, washable, adjustable elasticity with buckle, you can change its length according to your facial contours to prevent leaving marks on your face after taking off. Protects your mouth and face against dust, cold, dust, pollen, allergies, fog and haze, exhaust emissions, passive smoking, etc. Accessory structure: 1 is equipped with 2 filters, 5 is equipped with 10 filters, 10 is equipped with 20 filters