I have a 35 degree REI bag, and a 40 degree REI bag, I did a trial run a few weeks ago in the upper 30's with the 35 degree bag, and stayed warm, with the my underquilt in place. I am getting ready for a weekend trip and the forecast is for mid 20's. The 40 degree bag is 3/4 zip, so I am thinking of using it as an over quilt.
Any thoughts?
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