сменная 5 слойный fapad рм2,5 с фильтром рм2,5 activate углерода маска активированного угля пыли pm 2.5 с воздуха

replaceable 5 ply fapad pm2.5 with activated carbon dust pm 2.5 s air .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.