xknut unisex рм2,5 anti-dust пыл gas mask faand 2шт активировать угольный фильтр колодки из активированного угля дым с клапаном колодки мног

xknut unisex pm2.5 anti-dust dustproof gas mask faand 2pcs activated carbon smoke with valve pads reusable n9.1.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.