прокладка non сплетенные одноразовые лица 3-слойный дышащий колодки для рм2,5 activate углерода фильтра лицевой маски рот маска для лица pad

gasket non woven disposable face 3-layer breathable pads for mouth facial mask pad vyr0 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.