pm2.5 активировать углерод фильтр маски колодка 5 слоя рта 2.5 дизайнер famask пылезащитной маски ядро замена маска только pad

pads 5 layer pm 2.5 designer famask dustproof mask core replacement mask only 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.