сменная 5 слойный лица pad рм2,5 с рм2,5 активировать углерода маски фильтра из активированного угля пыль рт 2.5 с воздуха

replaceable 5 ply face pad pm2.5 with activated carbon dust pm 2.5 s air 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.