Fellowes AeraMax DX5 replacement HEPA filter | True HEPA Filter captures 99.97% of particles and impurities as small as 0.3 microns, including mold spores, pollen, dust mites, most airborne microbes, allergens and cigarette smoke | Built-in AeraSafe Antimicrobial treatment protects from the growth of odour causing bacteria, mildew and fungi | Compatible with Fellowes AeraMax DX5 Air Purifier | Replace the True HEPA filter approximately every 12 months to ensure that the Air Purifier continues to operate optimally