They do get a little hot on the back but in this weather everything is hot,
right? :-) A little extra heat is MUCH better than risking dehydration or
running out of water. You *can* freeze the bladders like you can a water
bottle - just fill them half way, freeze, then fill when you're ready to ride.
Bouncing is not an issue if you're riding right :-) I find that when I'm
sitting correctly there is no movement - even when it's full. It's when I
collapse a little to one side or forward that I get some bouncing so I know
to straighten up!
I have not had any trouble with rubbing on the shoulders or anywhere else -
after I put it on I don't even know it's there.
Any other questions drop me a line
Tina - camelbak convert
hickst@nichols.com