Kirby Micron Magic HEPA Filtration with MicroAllergen Technology Bag, 2/pk. Kirby Allergen Reduction Filters. Removes 99.97% of common household dust, pollen, mites, and other particles -Electrostatically charged material traps sub-micron particles -Certified to meet H 11 filtration standard per EN1822 -Maintains higher airflow throughout the life of the bag, for up to 100% greater filtering capacity -Fits All Generation Series Models