I'm a big fan of the Enlightened Equipment brand. They don't carry them at REI, but they are custom made, super light, and are super comfy. They specialize in "camping quilts" so they aren't mummy bags, but they can be used like a cape while bumming around camp in the AM or PM too. My wife has the 10 degree version. I have the 20 degree. 

- I'm the best at being me when I'm outside
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