3шт набор рм2,5 рот маска pad активировать угольный фильтр площадку дети breath valve anti haze дышащий маска анти пыли рот муфельной лица д

3pcs set 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.