Our top-of-the line filter captures 99.97% of airborne particles from the air passing through the filter media, including dust, allergens, bacteria and viruses. Designed with electrostatic air filtration, the Filtrete Premium Allergen, Bacteria & Virus True HEPA Filter traps particles 1000x smaller than the human eye can see. Say hello to cleaner, fresher indoor air. Filtrete knows your home filtration needs are as unique as you are, that's why we've designed a family of room air purifier filters and devices to fit your lifestyle - from small to large rooms; True HEPA, to Odor Reduction - Filtrete has you covered.