5ply рм2,5 активированный уголь колодки против haze рм2,5 сменный фильтр dust бумаги mouth крышки для здоровья

5ply pm2.5 activated carbon pads anti haze dust paper mouth cover for health 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.