Anti-Dust Mask Activated Carbon Pollution Anti-Pollen Allergens Face Exhaust Gas Filtering Pm2, 5 for Running, Outdoor Cycling

Multi-purpose: mountain bike, running, horse riding, snowboarding, skiing, fast walking, climbing, cycling, walking, courier work and other outdoor activities, it can also be used as a protection against haze, anti-dust, etc. EASY TO CLEAN - The mask and valves can be washed when dirty, the filter is replaceable. SMOOTH BREATHING: This mask has a unique ventilation design..When you exhale, the valve is opened without resistance, double breathing valve, the air resistance is smaller, gentle breathing. Suitable for most people: made of elastic material, the size can be adjusted to fit most head types (up to 22.4 inches). This mask can fit different face sizes to prevent slipping..Lightweight, adjustable and comfortable PROTECTIVE AND WARM: Activated carbon mask filters most exhaust gases, pollen, chemicals, fumes and other irritating dusts..In cold weather, it keeps your face warm well.