Additional Details ------------------------------ Product description: Hoover SR Allergen Filtration Bags 401010SR Fits all Hoover Canister Vacuum Cleaners Using Type SR Bags, including Duros. 3 Bags per package. Traps 99. 98% of ragweed and common grass Pollens. Filters a wide range of airborne particles including many pollens, cat dander, spores and other allergens. Ideal for many with allergic or dust related discomforts.