рм2,5 одноразовая face mask рот прокладочные 3 layers анти респиратор pad хлопок ядро сменная дышащий маска прокладка

5 layer protective pm2.5 activated carbon disposable gasket safe anti dust breathable face mask replacement pad r1180 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, sm