This is cool. Just trying to get my head around the straps, so they go over your shoulder and that cross over sits between your shoulder blades on the back? So it doesn't directly attach to your pack, and when you take your pack off, this stays on? I like that idea a fair bit, saves putting extra pressure on a small point of your pack shoulder straps say on your clavicules. Is that a piece of synthetic insulation on the front of one? What is that for?
Did you get your idea from say the old Rhodesian chest rigs?