I have a feeling that this is a marketing project. You will have to take up the raised center of gravity with the engineering class!!!

I don't WEAR (not where) a hydration system. I use the 2 bottle cages on my frame, and if it is very hot and I know 2 bottles aren't enough, I put a 3rd one in a jersey pocket. My back always gets sweaty- see my post in the "why shave your legs" topic. 15$ would pay for some hair removal to alleviate same sweaty condition.

DEMON