5 анти тч2.5 загрязнения слоя 12,5 * 8см взрослого рот маска pad одноразовой анти рм2,5 бумаги заменяемой сек крышки

5 layers 12.5*8cm adult mouth mask pad disposable anti pm2.5 paper replaceable s cover 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.