лот сменной бумаги 5 слоев анти haze пыль face рот маска колодка активированные дети углерод личные чип

lot replaceable paper 5 layer anti haze dust face mouth mask pads activated carbon personal chip features: 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.