рм2,5 сменный фильтр 40pcs box pad анти рм2,5 бумага для faprotective dustk новая дышащий маски сек s151

40pcs box pad anti pm2.5 paper for faprotective dustk new breathable mask s s151.1.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.