I used a 3/8", wide CCF pad with a 3/4 length inflateable InsulMat a couple days ago down into the mid 40's with 14 mph wind gusts and was plenty warm with a silkweight baselayer, fleece beanie, and 30 degree down bag. It felt like I could get down to about 40 degrees with that setup. I don't think I could have gone lower and I am a warm sleeper.
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