Filtration bags meet all HEPA certifications and specifications. Constructed with three layers of Filtrete HEPA filter media. Fits all Hoover® bagged upright cleaners, including the WindTunnel™ uprights, that use "Type Y" or "Type Z" bags. For Use With: Hoover® CH53005, Upright Vacuum Cleaners, WindTunnel™ Upright Vacuum Cleaners.