горячая одноразовая маска pad рм2,5 нетканые ткани маска заменяемые layers для лица pm2.5 защитные продукты

pm2.5 adjustable earloop mask include pad adults kids dustproof reusable cotton protective face mask for cycling running outdoor 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