лицо anti-dust дым открытой закрытая регулируемая одноразовые масок для лица фильтра колодки многоразовой маски с 2 одноразовой маской pad д

face anti-dust smoke outdoor indoor adjustable reusable mask with 2 disposable mask pad for pm2.5 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.