The Fellowes™ AeraMax™ DX95 True HEPA Filter captures 99.97% of particles and impurities as small as 0.3 microns, including mould spores, pollen, dust mites, most airborne microbes, allergens and cigarette smoke. Filter is compatible with the Fellowes™ AeraMax™ DX95 Air Purifier. Replace the True HEPA filter approximately every 12 months to ensure that the Air Purifier continues to operate optimally.