рм2,5 активированный уголь pad 5layerpm2.5 сек inpm2.5 sert защитный коврик анти haze рту заменяемое рм2,5 сек для mapm2.5 ск gga3293-1

disposable mask 3 layer earring dust mask covered with 3 layers of non-woven cloth dust mask soft breathable outdoor pad pm2.5 b1 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