50 круглая площадь рм2,5 activate угольный фильтр заменяемый маска нетканые трехслойная защитная дышащий мужская маска repleaceable pad dust

50 round square non-woven three-layer protective breathable unisex mask repleaceable pad dust proof s 4fx0.1.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.