40pcs рм2,5 маска с activate угольный фильтр коробки прокладок замена противотуманно щитки для кожи дышащая рот маска qsl8

40pcs box gasket replacement anti-fog protective pads skin-friendly breathable mouth mask qsl8.1.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.