100- одноразового лицо замены инги pad дышащей маски прокладка дышащего мат для всех видов рм2,5 of

20 30 3 layers non-woven disposable mask pad efficient filtration mouth covers replacement inner gasket for mask 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.