Kirby bags
Allright to clear up any confusion, I gave them a call. It seems they will discontinue the brown Hepa bags which are usually labeled G6 and Ultimate G, Part #'s 197201 (3pk) and 197301 (9pk). So if you want HEPA you have to go with the Universal Style F bags which are the cloth style bags. Actually the g3 bags, and the g4 and 5 bags will work on g6 and Ultimate G and the very early Sentria. Every time Kirby came out with a new model early in the G series, they came out with a new bag that just had higher filtration. The later Sentria had the flip down bag bracket and must use the F style bags.