сша box анти загрязнения рм2,5 изоляция чистовая для замены защитный дышащий pad сменная против пыли маски

usa box isolation fine for replacement protective breathable pad replaceable anti dust mask.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.