маска pad замена бумаги фильтра лицевой маски рм2,5 реактивировать уголь для famask mouth универсальная защитная дышащая pad заменяемое

mask pad replacement paper for famask mouth universal protective breathable pad replaceable.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.