рм2,5 регулируемые ушная маска активировать угольный фильтр рм2,5 маску включить pad взрослых дети пыл многоразового хлопок защитного famask

pm2.5 adjustable earloop mask include pad adults kids dustproof 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.