3ply Dust Mask with Valve Material:PP/S+MB+ pet/ needle punched Standard:N95,N99. FFP1 FFP2 ... polypropylene face mask, conical mask, dust mask, non-woven polypropene face mask, disposable dust mask, facial dusk respirator, non toxic mask, non-woven polypropylene face mask, triangular filter mask, spunbonded polypropylene face mask ...