The AeraMax® PRO II Hybrid Filter combines the air-cleaning power of True HEPA and Activated Carbon Filter in one. The True HEPA filter captures 99.97% of airborne particles as small as 0.3 microns, including pollen, ragweed and other allergens, viruses, germs, dust mites, mould spores, pet dander and cigarette smoke and includes antimicrobial treatment that provides built-in protection from the growth of odor causing bacteria, mildew, and fungi on the HEPA filter. Activated carbon filter reduces odours and VOCs. Compatible with AeraMax® AM 3, 4, 3S, 4S Air Purifiers. One year filter life (depending on use).