одноразовые прокладки рм2,5 сменный фильтр четыре слоя водонепроницаемый дышащий pad пылезащитное анти-туман маска замена защитный 2020 gx5z

disposable gasket four-layer waterproof breathable pad dust-proof anti-fog mask replacement protective 2020 gx5z 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.