рм2,5 рот маска pad дети дыхание взрослые valve anti haze дышащая маска анти пыль роты муфельного лицо ребенок

pm2.5 mouth mask pad kids breath valve anti haze breathable mask anti dust mouth-muffle face children 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.