сменная рм2,5 сменный фильтр anti-fog защитные одноразовая хлопок безопасности anti-dust пыльца маска pad h4l1

replaceable anti-fog protective disposable cotton safety anti-pollen dust mask pad h4l1 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.