уплотнитель safe dust дышащий рот fareplacement удобная маска фильтр рм2,5 для маски activate углерода pad e5dc sb7r

gasket safe dust breathable mouth fareplacement comfortable mask pad e5dc sb7r.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.