Filtration vacuum bags are designed for high filtration of common household allergens, trapping 99 percent of dust and pollens down to 5 microns. Type Y Allergen filtration fits Hoover upright vacuums, including the Hoover WindTunnel Commercial Clean-Air Upright Vacuum and other WindTunnel uprights that use Type Y or Type Z bags.
Hoover C1703-900 WindTunnel 13" Commercial Bagged Vacuum Cleaner
Techtronic Industries Co Ltd HVR 4010100YCT Hoover Type Y Allergen Filtration Bags - 36 / Carton - Type Y - Black