zy8ss 5 рм2,5 сменного фильтр layers защитной fliter дышащего пыле замена велоспорт fainsert маска inner колодка рм2,5

zy8ss 5 layers protective fliter breathable dustproof replacement cycling fainsert mask inner pads pm2.5.1.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.