Infityle Dustproof Face Mask - Activated Carbon Dust Proof Pollution Respirator with Filter Filtration Cotton Sheet and Valves for Exhaust Gas, Anti Pollen Allergy, PM2.5, Running, Cycling PREMIUM MATERIAL: The mesh of the dustproof mask cover is well built by premium Nylon, offering excellent permeability. More thick and full Carbon fiber filter makes the filter layer more clean and sanitary. Suitable and important for your life. BEST PROTECTION:The allergy mask separation of 98% of the dust, chemicals, smoke and particles, It can be used for dust, anti-vehicle exhaust, anti-pollen allergy, PM2.5, for cycling, hiking, skiing and other outdoor activitie. PERFECT DESIGN: With unique ventilation design, a plurality of holes, excellent permeability, exhale, the valve of work out mask is opened without resistance, double air breathing valve, air resistance is smaller, smooth breathing. CONVENIENT REPLACE: Easy replaceable filters,the product includes one activated carbon masks, two valves and filter cotton, you can replace by yourself .The mesh cover can be washed to keep clean. SELECTED BOUNS AND 100% FREE TRIAL!: BONUS Extra Filter Cotton Sheet and Valves , Order now and if you dislike it within 90 days, we will buy back from you, 100% RISK FREE!