EnviroCare Replacement Micro Filtration Vacuum Bags for Hoover Type W2 WindTunnel 2 Uprights 3 Pack 3 Hoover Type W2 Windtunnel Allergy Vacuum Bags for Hoover Bagged Upright Vacuum Cleaners Replaces original manufacture part numbers: W2, 401080W2 Premium Allergen Filtration. Good for Allergy Sufferers. 99.7% of all dust particles are captured with Envirocare Micro Filtration bags EnviroCare Premium aftermarket Part # 329