famask factory hot 3 слоя дышащего защитного рот маски замена pad для рм2,5 фильтра activate углерода для взрослых детей

famask factory hot 3 layers breathable protective mouth mask replacement pad for adult kids.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.