czras 5 слоев замена пыле безопасности колодки рм2,5 против пыли fa pad хлопок маска рм2,5 активировать углерода маски фильтра защитные дете

czras 5 layer dustproof safety replacement pads pm2.5 anti dust fa pad protective children mask c.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.