5 слой анти пыленепроницаемый лица сменная оптовая взрослые активированные рм2,5 активировать угольный фильтр вставки carbon face mask pad

5 layer anti dust proof facial replaceable wholesale adult activated carbon face mask pad 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.