... Respirator, PRF-103M1,provides the water proof main body design,three filters socket Dust and Gas Proof Powered Air Purifying RespiratorType: PRF ... which can uniformly distribute the weight, easy in operation with remarkable positive pressure, service life, airtight and filtrating functions ... -103M1 is used in many kinds of condition with various particles (dust, fog, smoke and the like) and poisonous ...