Thank for the opinions offered. I decided to go with a 40° Burrow. I also grabbed a $22 Microfiber fleece bag liner off Amazon. I figured in most cases when I hike, the burrow should land right in the sweet spot. If the temps drift up into the 60+ over night temps I can leave the burrow home and take the fleece liner. In the event that the overnights might drop into the 40s or a bit lower I can bring both the fleece and the Borrow. The combo should help me stretch the late spring early fall seasons.
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