3layer прокладка безопасного включения угольный фильтр маска для лица рм2,5 против пыли дышащий рот famask замена pad комфортное pad

3layer gasket safe anti dust breathable mouth famask replacement pad comfortable pad.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.