взрослый пыле против пыли загрязнение месяц защитная маска рм2,5 фильтр breath моющийся многоразовый муфельная защитный с 10 pad

adult dustproof anti dust pollution month protective mask breath washable reusable muffle protective with 10 pad.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.