WHY SHOULD WE NEED THE DUSTPROOF MASK? Are you now troubled by dust chemicals, smoke, particles, virus and bacteria? Do you want to enjoy safe life? Are you live in haze days, dust, vehicle exhaust, air pollution? Our environment are full of dust, haze, vehicle exhaust, air pollution, and the dust mask can keep you from 98% dust ,dirt, pollen, allergens, fumes or particulates that effect you breath in the air. Product Features: Breathing easily Skin cared and comfortable in wearing Adjustable fitness between mask and nose with nose clip and earloop Health and environmental protection materials Dust mask with valve Specification Uses: Running, cycling, riding, motorcycle, woodworking, lawn mowing and other outdoor activities.