The Shark Air Purifier NANOSEAL Filter with true HEPA captures 99.98% of large, small, and micro-sized particles from the air and is equipped with carbon for protection against household odors and VOCs. Based on IEST-RP-CC007.3, 0.1-0.2 microns. Treated with Microban. Microban reduces bacteria growth on the HEPA filter surface. Shark Air Purifier Anti-Allergen Filter with True HEPA Air Purifier Filter | HE1FKBASMB