Originally Posted by
DownEaster
Answer:
It's not because I'm opposed to new (and lighter) gear ideas; no, it's because I turn in my sleep. A quilt insulates best when both edges are tucked under you. Every time you rotate you drag the quilt with you, exposing the opening to the cold night and venting out all the air your body has warmed. The abrupt change in temperature forces you awake until you tuck both ends under you again in your new position. I tend to sleep on my side, but alternate between left and right. A quilt in low temperatures would interrupt my rest repeatedly, making for a miserable sleeping experience. When a mummy bag turns with me there's no sleep-disturbing chill.