dhl ship kids f grey face mouth mask suitable pad for k kf94 2 1 pm2.5

pad for kids f grey k famouth mask pm2.5 suitable for k kf94 2 1 f grey k face q.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.