pm2.5 pm2.5 лица активировать угольный фильтр вставки маски антивремени пыль лицо роты муфельного хлопок колодка

pm2.5 face mask s anti dust face mouth muffle cotton pads 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.