81ch слой 5 взрослых дети колодка insert защитного коврик рот хлопок маска рм2,5 activate углерода маска фильтр заменяемых сек рм2,5 маска p

81ch layer 5 adult child pads insert protective mat mouth replaceable s pm2.5 mask pad mma3365 cloth face.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.