Polluted air first passes through Alen's washable Pre-Filter to capture large particles, extending the life of the filter.  In the second layer, air moves through a unique, NEW H13 Grade True HEPA filter that Removes 99.99% for PM 0.1 capture, 99.995% for PM0.3 and captures dust, pollen, pet dander, mold spores and other airborne pollutants.  Alen then adds an Antimicrobial Compound to the HEPA type material, protecting the filter from harmful bacteria* and microbe growth.  In the final layer, clean air passes through a layer of Alen's Activated Carbon, reducing light odors and chemicals commonly found in the air from cleaning products, smoke, cooking, pets and various other household materials. 

* Test results demonstrate a 99.99% kill rate on E. Coli and Staph Bacteria.