оптовый сменный 5 слойных лицами pad одноразовый рм2,5 фильтр рм2,5 с активированным углем пыль рм2,5 фильтром рта 2,5 с

wholesale replaceable 5 ply face pad disposable pm2.5 with activated carbon dust pm 2.5 s features: 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.