одноразовая маска pad одноразовая маска pad трехслойная одноразовые прокладки пыли и рм2,5 водоотталкивающая колодки

pm2.5 mouth mask anti-dust mask reusable mask with breathing valve kn95 washable mouth n95 face pad in stock 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.