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KN95 Mask 5 Layers Filter Function

The first layer: spunbond cloth, filter the dust of micron

The second layer: to filter industrial pollutants, automobile exhaust, second-hand smoke pollen allergies

The third layer: activated carbon cloth, benzene and a smaller function of filtering dust microns

The fourth layer: filter density, smaller material

The fifth layer: Spunbond cloth, filter out all kinds of harmful substances;