дыхание клапан рот pad борьба с загрязнением моющаяся маски для лица прокладки фильтра пыле рм2,5 маски многоразовых с ljjo7815

breath valve mouth pad anti pollution washable dustproof pm2.5 mask reusable with ljjo7815.1.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.