1.4ply Dust Mask with Valve 2.Material:PP/S+MB+ pet/ needle punched 3. ... size:55*44*35cmGenerally weight: pps40 gms+ ac60gms + mb60+pet180gmrs Face Mask:nuisance dust mask, conical mask, dust mask, non-toxic ... respirator, non toxic mask, non-woven polypropylene face mask, triangular filter mask, spunbonded polypropylene face mask, nuisance dust mask, etc.We are ...