filter breathable pad original shipping ing fareplacement fast mask gasket skin friendly respir v3w3

fast shipping fareplacement ing pad breathable mask gasket skin friendly respiring mat in stock fy8000 20200421 u.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.