3M Filtrete Hoover Y & Z Micro Allergen Vacuum Bag Fits vacuum models All HOOVER* WindTunnel* (excluding WindTunnel* 2), Savvy*, Tempo* Widepath*, T-Series* WindTunnel* Pet, AutoDrive*, Breathe Easy*, Caddy Vac*, Dimension*, DirtFINDER*, PowerDrive*, PowerMAX* and TurboPower* 3500, 3700, 4500, 5000, 6000, 7000 Bagged Uprights. Micro Allergen bags help trap 90% of airborne pollutants 1 micron or larger, including household dust, dust mite debris, grass and ragweed pollen. Vacuum Bags should be replaced every 30 to 60 days for optimium performance. All vacuum brand and model names are registered trademarks of vacuum manufacturers.