dhl shippm2.5 adjustable earloop include pad adults kids dustproof reusable protective face mask cotton pm2.5 activate carbon mask

pm2.5 adjustable earloop mask include pad adults kids dustproof reusable cotton protective famask for cycling running outdoor c.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.