dhl shipin stock k mask kids pm2.5 haze dust mouth cap with breathing valve for pad qab4wh

in stock k mask for kids pm2.5 haze dust mouth cap with breathing valve for pad r.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.