5 layer mask взрослый ребенок колодки маски фильтровальную подушку insert защитный коврик рта сменным сек рм2,5 mask pad

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