... HIGH FILTRATION EFFICENCY, LOADED POLYPROPYLENE METERIAL WITHOUT ANY TOXIC, IRRITATING, STIMULANT, POISON.ADJUSTABLE NOSEPIECE AND INNER FOAM PROIVIDE A CUSOM SEAL ... NORMAL TOXIC AND TING MICRON PARTICLESUITED TO MINING, BUILDING, GRINDING DRUGS, CASTING, AGRICULTURE, FARMING, ELECTRONIC, FOOD PROCESSING, CEMENT TEXTILE, DISINTEGRATION, CARVING ...