дыхательный клапан маска anti-dust регулируемых дети взрослые рм2,5 активировать угольный фильтр рм2,5 маску многоразового mouth муфельные с

breathing valve mask anti-dust adjustable kids adult pm2.5 reusable mouth muffle with 2 mask pad cca12023.1.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.