This is a great topic so far I own atleast 3 of them and I’m not happy with none. Ideally u want a back pack tight to ur back while riding , long story short I have one too big one 2 small one 2 bulky some of the straps don’t stay tight. etc etc , my biggest problem I think tho It always seems I need a back pack when I’m already out on my bike so I’m going to drive home first to get it?!?! Pain in the butt! , my next back pack I’m looking for I think will have no padding or dividers I want to be able too ball it up or fold it or even have a separate cove to place it in even if it’s a zip lock so I can make it small enuff while not useing it to fit in the storage in my tail!