2020 взрослый ребенок рм2,5 прокладка дыхательная маска pad коврики рм2,5 хлопок маска для лица активировать угольный фильтр сменная anti-fo

2020 adult child pm2.5 gasket breathing mask pad mats replaceable anti-fog protective mask.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.