Activated Replaceable Carbon Filter Paper
Adult Size; Quantity 4
First layer of spun bond cloth filters micron-level dust.
Second layer filters industrial pollutants, automobile exhaust, second-hand smoke, and pollen allergens.
Third layer of activated carbon cloth filters micron-level dust; Fourth layer offers filter density for smaller material.
Fifth layer of spun bond cloth filters out all kinds of harmful substances.
Please note: Filter insert can not be cleaned and should be replaced every 1-2 weeks. When film or sticky sediment stains emerge, please replace the filter