qsc9 рм2,5 пыли моющийся угольный pad пыле unisex хлопок equivalent маску рм2,5 с активируйте угольным фильтром для маскирования free famask

qsc9 pm2.5 dust washable activated carbon pad dustproof unisex cotton equivalent to mask free famask with breathing.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.