dhl ship and anti-dust gas smoke pm2.5 fawashable 2 1 factory activated carbon pads face filt n0up

mask pm2.5 anti-dust and gas smoke fawashable 2 1 factory outlet activated carbon pads reusable mask in stock n.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.