мешок сменной анти-туман защитных одноразовая хлопок безопасность анти-пыльца пыль маски pad одноразовой маски для лица фильтра колодка qjwe

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