5 рм2,5 слой активации углерода маски фильтра цикла 3bbae рм2,5 анти мутность анти-пыль fadustproof углерода хлопок маска спорт коврик актив

3bbae pm2.5 anti haze anti-dust fadustproof carbon cotton mask sport pad activated mouth-muffle with valve.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.