Even though this reply comes years late I thought I would throw this out there...I sleep cold and find the Burrow (no overfill) to work well at 70 if I migrate the down to the edges and as low as 40 if I migrate the down to the center before sleeping. Very versatile and well made top quilt. I have a 20 degree burrow with oodles of overfill and it has MUCH less of a variable temperature range. BE careful when ordering overfill in some cases!
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