анти рм2,5 хлопок анти haze anti-dust famask маска рм2,5 активировать угольный фильтр маска для лица с активированным углем pad рот-муфельны

anti pm2.5 cotton anti haze anti-dust famask activated carbon pad mouth-muffle with valve.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.