горячие одноразовые маски колодки 5 слой рт 2,5 пылезащитный маска фильтр с сердечником рм2,5 замена маски только pad

hot disposable mask pads 5 layer pm 2.5 dustproof mask core replacement mask only 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.