I pack a lot, prob just as much as a woman, I am a tee shirt whore lol sooo I have a 50 in mono with strap and a mc 45 black, I cant fit a lot in each. I personally dont like the 55, I think it is too large, but thats just my opinion. Honestly, I would rather carry two bags (2 keepalls, like 2 50's or 1 50 and a 45, than one 55) call me crazy lol