sunpangpang Sport Dust Mask,Anti-Pollution/Allergy Lifestyle&Sports Facemask,Activated Carbon Dustproof Masks with Filter Allergy Mask for House Cleaning and Gardening,Pollen Allergy,Running,Cycling healthy breathing---Coming with active carbon filters,our allergy mask separation of 98% of the dust, chemicals, particulates, gas, pollen, smoke and fumes.The dustproof mask can be used for anti-dust, anti-vehicle exhaust, anti-pollen allergy, anti PM2.5 and haze day protection. It is suitable for cycling, running, biking, hiking, skiing,woodworking and other outdoor activitie. Peplaceable activated carbon filter---Two valves design act as blockers to the air, which help to achieve the effects of high altitude&low air concentration condition. This will increase the efficiency of your lung capacity training to some extent.It is recommended to replace theactive carbon filters once a month. Perfect design---The protective cover for your nose and mouth is made of long lasting neoprene material. Adjustable aluminium nose clip can be shaped to your nose for a perfect fit that prevents slipping.Most customers always complain others dust mask is easy to slide off, however our cycling mask with adjustable earloop, velcro strap and nose clip which is not easy to slip off during wear it. Multi-Purpose----suitable for all activities where you may be exposed to dust, pollution, smoke, haze- limit/prevent contact with air contaminants and stay super healthy. Universal Size & Quality guaranteed---We guarantee you that our Activated Carbon Dust - proof Sports Mask are made from the good quality materials. Dont hesitate. If you have any question about it, just tell us and we will provide you a satisfied solution.