activated dhl shipreplaceable 5 ply pad with pm2.5 activate filter face carbon for cycling cleaner mask tlpfy7012 qarakpsjpg

replaceable 5 ply famask pad with activated carbon mask for cycling cleaner mask tlpfy7012 e.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.