одноразовая маска 3 слоя пыли серьга маска покрытые 3 pm2.5 слоями нетканого материала респиратор мягкая дышащая открытый pad рм2,5 a1

disposable face gaskets elastic ear loop mask pm2.5 activated carbon insert protective pad for mouth mask 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.