Originally Posted by
meter-man
Thanks for the constructive thinking.
For me, touring in the Sierra Nevada (California) 90% of my touring days, the main things I want to have access to during an ascent (1-3 hours) are water/liquid, snacks, lip balm, navigation/phone/camera. Lip balm and phone can go in my pants pocket. So, just need access to liquids and food. Everything else can wait until the top.
Hydration hoses freeze so those don't work well. Personally, I don't like the hard plastic bottles on shoulder straps - those are bulky and annoying. I use and prefer collapsible water bottles/bladders. Those are great and far less obtrusive for skinning and skiing. They fit great in the Cirque 22 shoulder straps.
On that note, I strongly recommend you check out Cirque 22 shoulder/vest straps for inspiration. They are a bit more vest-y than your design, but certain design elements (stretchy pocket, shockcord loops for gloves) could be incorporated in more "normal" shoulder straps.
Also, for me, a zip pocket on the hip strap (or two - better yet) is mandatory. Do that plus some way to carry water on your straps - A+ for me.