рм2,5 активировать угольный фильтр сменный одноразовая маска рот прокладки против пыли anti-fog маска pad 3 слоя рта лица прокладка безопасн

disposable mouth mask gaskets anti dust anti-fog mask pad 3 layers mouth face gasket safety 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.