Hoover Type S Allergen Back (6-Pack), 4010100S Size: 6 Bags Model: 4010100S (6) Hoover Genuine Filter Bags Allergen Filtration Type S Type S Allergen Filter bag Bags fit all Hoover canister vacuums using Type S bags Bags trap dust mites, pollens, cat dander, molds, other particles Electrostatically charged liners help capture extremely fine particles