dhl shipkids face mask fawith dust gas hygiene mouth mask pm2.5 kid pad cotton reusable and washable kids

kids famask cotton fawith pad dust gas hygiene mouth mask cotton reusable and washable kids k.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.