True HEPA filter with AeraSafe(TM) antimicrobial treatment safely removes 99.97% of airborne particles as small as .3 microns, including pollen, ragweed & other allergens, viruses, germs, dust mites, mold spores & odors; AeraSafe(TM) antimicrobial treatment provides built-in protection from the growth of odor causing bacteria, mildew & fungi on the True HEPA filter; Compatible with Fellowes(R) AeraMax(R) 290 air purifier;