рм2,5 регулируемые ушная маска включить pad пыл против дыма многоразового хлопка защитного famask для велоспорта запуска маски фильтра рм2,5

pm2.5 adjustable earloop mask include pad dustproof anti smoke reusable cotton protective famask for cycling running outdoor.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.