Kirby Style F # 204808 Allergen Reduction Filter HEPA Filtration Vacuum Cleaner Bags for Kirby Genuine Kirby Part#204808 MicroAllergen Technology Removes 99.7% of Common Household Dust, Pollen, Mites and Other Particles Electrostatically Charged Material Traps Sub-Micron Particles Certified to Meet H11 Filtration Standard per EN1822 Sentria, for units built on 2009 and later.