маска non-woven активировать угольный фильтр маска для лица pm2.5 pm2.5 мат pad замена колодок для детей

mask non-woven pm2.5 mat pad replacement pad for kids.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.