I use a light weight down mummy bag when I backpack or cycle tour for the obvious weight and compactability reasons. Trouble with it is that it is generally too warm out for a down bag. Opening it up and using it like a comforter works great: cooler and not confining. I also use a Therma-Rest sleeping pad and I hated the sticky feeling sleeping directly on it. Here's the tip: This year I had a local seamstress that specializes into outdoor clothing make me a sleeve that slides over the inflated Therma-Rest. It is fleece on one side and tough nylon on the other. The fleece side is comfy and cool. I wont sleep without it now.