Extra protection if needed for situations where it may be difficult to social distance. Non-woven, Active Charcoal cloth. PM 2.5. 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.
Be carefull of cheap versions, there are various qualities.
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