I have been looking for a warmer weather bag for sometime. The reason I am looking for a sleeping bag instead of a quilt is I want the versatility of being able to use it on the ground or in a tree. I have a Western Mountaineering 10 degree bag and it is way overkill for most summer camping. I have used it below zero and slept fine.

My main question is are the stretch numbers on the Montbell bag realistic. It says they stretch from 57-81 in the shoulder. I am a big guy and my WM bag is 66 in the shoulders and is tight. Which is fine when it is 0 degrees but I am looking for something with a little more wiggle room for the summer.