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, mold spores and odors. AeraSafe™ antimicrobial treatment provides built-in protection from the growth of odor-causing bacteria, mildew and fungi on the filter. Compatible with AeraMax® Air Purifiers.