универсальный рм2,5 фильтр activate углерода одноразовые прокладки для кожи колодки пакет маска пыли предотвращение a1cm vy49

universal disposable gasket skin friendly pads pack mask dust prevention a1cm vy49 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.