You simply need a longer pack, and/or a lighter load so you don't rely on the hipbelt as much. Now me, I have six-pack abs. trouble is they're underneath a six-pack pillow. I probably don't wear a hipbelt in the place I am *supposed* to, and well, I generally don't care. Stop worrying about where the hipbelt *should* go and where the hipbelt *can* go, and try the pack out on him under load.

I end up using a long torso pack for this reason. it works ok given my body shape, although my vast preference is for a light load and the heck with the hipbelt. It also means I tend to lighter frameless packs anyway.

Having said that, I do have couple of long length tanks that work well for heavy loads with me.
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