1)Conforms to international standarrds: EN149: 2001 FFP1 FFP2 FFP3 CE0194 AS/NZS 1716: 1994 NIOSH N95 Low breathing resistance with high filtration efficency. Loaded polypropylene material without any toxic, irritating, stimulant, poison. 2)Adjustable nosepiece and inner foam proivide a custom seal for different facial sizes. 3)special 3-ply pleated design, hign filtration and static electricity material to resist normal toxic and ting micron particle. Suited to mining, building, grinding drugs, casting, agriculture, farming, electronic, food processing, cement textile, disintegration, carving, heavy metal pollution, gardening, glass^^etc workshops. Package: 1)Box: 20PCS/box 400PCS/carton CTN size: 30*30*40cm 2)head card: 20PCS/head card, 400PCS/carton, CTN size: 30*30*40cm 3)Film Shrinked packing: 20PCS/box, 400PCS/carton, carton size: 30*30*40cm