Conforms to ergonomics, cup shape, light weight, supple sense, comfortable to use, no peculiar smell; made from strong-static materials with high filtration efficiency, effectively filter dust; adjustable plastic nose bridge fixing strip fits well with face. Applied in mining industry, building industry, castings industry, grinding, pharmacy, agriculture and gardening, forestry and graziery, subway engineering, aluminum work, electron and electrical appliance, instruments and meters manufacturing, food processing industry, cement factory, textile factory, tool and hardware factory, sheet metal working and polishing, cutting, disassembly engineering, crumbling work. It can effectively prevent harmful pollutants like nonferrous metal, heavy metal, also obstacle glass fiber, asbestos, etc.