Our top-of-the line filter captures 99.97% of airborne particles as small as 0.3 microns from the air passing through the filter media (based on Initial Efficiency Value) including dust, allergens, bacteria and viruses. Designed with electrostatic air filtration, the Filtrete™ Premium True HEPA Filter traps particles 1000x smaller than the human eye can see. Air Purifier Filter Type: True HEPA; Filtration For: Airborne Particles; Allergens; Bacteria; Dust; Dust Mite Debris; Exhaust Particles; Lint; Mold; Pet Dander; Pollen; Smog; Smoke; Ultrafine Particles; Viruses; Air Cleaner Compatibility: Filtrete™ Room Air Purifier FAP-C01BA-G1, FAP-T02WA-G1; Width: 7.3".