mask pad 5 activate k original adults/kids face filter washable layers insert dustproof reuq5l q62q

adults/kids k famask pad 5 layers insert dustproof replacement anti gas pm2.5 carbon breathable ation pads t.1.the first layer: high efficient filter cloth filter the dust of micron.2.the second layer: meltblown cloth to filter industrial pollutants, automobile exhaust, second-hand smoke pollen allergies.3.the third layer: high efficient filter cloth filter benzene and a smaller function of filtering dust microns.4.the fourth layer: activated carbon cloth filter density, sma.