factorye6b6shiplot 10*7cm dhl children paper pm2.mask for mouth anti dust haze activated carbon kid mask fil

lot pm2.5 10*7cm children paper for mouth mask anti dust haze activated carbon kid mask 5 layers s pad m.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.