PM 2.5, protects from Dust, Haze,Allergies, Smoke, Pollution, Ash, Pollen, Gardening, Crafts, etc.
Five Layer Protection:
The first layer of spunbond can filter micron-level dust.
The second layer filters industrial pollutants, car exhaust, second-hand smoke and pollen allergens.
The third layer of activated carbon cloth filters micron-level dust.
The fourth layer filter smaller materials.
The fifth layer of spunbond filters out various harmful substances.
The filter can not be cleaned.