In reply to BnB:
> My wife has a very short back and the 18" back on most 20-25 litre packs results in the load resting on her bum!! The website specifies the back profile for most of your packs, but not the Eclipse
I don't have a particularly short back, but do have a very curvy back (deep hollow and then a sizeable bum
), and so have a similar problem.
My experience is that very structured back systems are rarely helpful, and the more minalist sacs are better because they bend to fit - certainly for day sacs - I tend to use an OMM sac most of the time, or one of two old Macpac (that just have a foam mat back) for any single day trips, even when it's a fairly heavy sac of climbing gear.