PM 2.5, best to protect your mouth and face from Dust, Haze, Germs, Allergies, Smoke, Pollution, Ash, Pollen, Gardening, Crafts, etc.
Five Layer Protection:
1st layer of spunbond cloth filters micron-level dust.
2nd layer filters industrial pollutants, automobile exhaust, passive smoking, and pollen allergens.
3rd layer of active carbon cloth filters micron-level dust.
4th layer offers filter density for smaller material.
5th layer of spunbond cloth filters out all kinds of harmful substances.
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