5 layer взрослый ребенок одноразовая маска колодки insert защитный коврик рту заменяемое s взрослый рм2,5 фильтр activate углерода рм2,5 мас

5 layer adult child disposable mask pads insert protective mat mouth replaceable s pm2.5 mask pad k917 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.