1,non woven mask, 2,Material:Non-Woven Fabric, 3,Color:Blue,Green ... under specified conditions, protection products filter the air particulate matter.2. Flame-retardant performance: care products prevent itself being lit ... -glass fiber, non-irritating to the skin, and waterproof.2. Soft, comfortable, available to adjust nose clip3. Tiny ... play a role in blocking dust . many kinds of nonwoven facemask