Each Filter sold separately for additonal support at $2 each
 
 
 
 
This PM 2.5 Filter is crafted with five layers of support that contains activated carbon, non-woven fabric& melt blown paper. It helps block pollen, dust, pollution, keep you safe and healthy.
 
 
 
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