24hours shipping mouth 5 слоя рм2,5 активировать угольного фильтр заменяемой famask замена pad прокладка безопасность против пыли дышащей за

24hours shipping mouth famask replacement pad gasket safety anti dust breathable protective mask pm2.5 pad.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.