Original Hoover Y Bags Genuine Hoover Type Y Filtreteâ„¢ HEPA Filtration Bags to keep your Hoover vacuum cleaner performing well. Contains two high filtration bags constructed with three layers of Filtrete filter media. Filtreteâ„¢ is a trade mark and product by 3M. Fits Hoover upright cleaners, including the WindTunnel uprights, that use Type Y or Type Z bags and Royal upright model CR50005. These are Genuine Hoover Brand, part number 4010801Y (AH10040) *12 bags total