30 50 рм2,5 маски колодки 5 слой активированного угля рм2,5 маска с активированным углем активировать mouth faanti dust здравоохранения маск

30 50 pm2.5 mask pads 5 layer activated carbon mouth faanti dust health care mask pad 12x8cm.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.