Thanks to Kyle I tried out my Confluence Chest Pack last night for the first time. Only had it on for a couple hours but it was obvious that I could wear it for an entire day without getting hot and sweaty or feel at all weighted down...it's very comfortable. There is plenty of space for everything as well, if your running out of room with this your probably carrying too much equipment. Right now I'm carrying three medium sized boxes up front, with plenty of room to carry extras in the rear. I think once I get used to using it after a few more outings I'm going to grow to love it.