прокладка pad 1: 5 пропорциональный 3 слоя одноразовая маска с рм2,5 активировать угольный фильтр моющийся прокладки колодки ев

+ gasket pad 1:5 proportional 3 layers disposable face mask with gaskets s pads 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.