Originally Posted By wandering_daisy
I bought the REI Flash, took it home and loaded it. It was not comfortable so I took it back.


I did exactly the same thing. It really dug into my lower back. I agree that if you're carrying 35 pounds, the Flash may not work even if it fits you. The Deuter ACT Zero 45+10 is nice, except that the hip belt was too wide for me. The Granite Gear packs with adjustable torsos fit me well, and some are rated for up to 40 pounds or more.