Rather than comparing all the sleeping bags I looked at here,
I’ll just direct you to this really great comparison of
light weight sleeping bags:
http://www.backpacking.net/gear-reviews/sleeping-bag-review/
I wanted a bag that would keep me warm down to at least 30 degrees.
I don’t often camp in cold weather so a warmer bag would
just have added additional weight and been uncomfortable in warmer
weather. For me, the final choice was between the Marmot Hydrogen
and the Western Mountaineering Ultralight. It was a tough decision
but I went with the Ultralight because I could get it in a small
size that more tightly fits my body. I also wanted a full length
zipper and the Marmot bags only use 1/2 zippers. These were personal
decisions though and I would consider any of the following bags
to be worth consideration: