... blown3rd layer: 220g needle punched clothAdvantages of 3 ply protective disposable medical face mask:Conforms to international standard ... maintenance, hygienic, clean, environment friendly.Applications of 3 ply protective disposable medical face mask:Chemurgical, Spray-paint/printing ... , Disinfecting, Insalubrious workshops, etc.Package of 3 ply protective disposable medical face mask:20pc/box, 400pcs/ ...