I have tried many bags for my Kirby G5. Most recently, I've used Febreze bags available at Walmart. These bags were small and very difficult to put on. Using them would decrease Kirby's strength. Now dressing was easy. No fight or anything. The bag is large and Kirby breathed again as he ran. Never again will I try those slightly cheaper aftermarket bags. If you have Kirby make sure you have good bags!