famask pad 3 слоя прокладок продолжительное использование time of для k fafast активировать угольный фильтр рм2,5 маски доставки

famask pad 3 layers gasket extended use time of for k fafast delivery.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.