5layers прокладка фильтра для маски рм2,5 одноразовой бумаги pad против пыли haze рот спорта многоразовых масок для взрослых дыхания

5layers pm2.5 disposable paper pad anti dust haze mouth sports reusable mask for adult breath 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.