пылезащитный против пыли загрязнения полного рта маски дыхания широкой планки моющейся многоразовый фильтр рм2,5 муфельных защитной с pad

dustproof anti dust pollution full mouth mask breath wide straps washable reusable muffle protective with pad features: 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.