Intending to test some bags this weekend, I set up camp on the back deck. It's shaded and out of the wind, kind of like A/T shelters. At about 12dF a Thermarest Toughskin was found to be lacking, So I hustle in to swap it for two Ridgerests, one regular and one deluxe. They did well together until I rolled onto my side and the hips got cold. I've been on snow at those temps with one Ridgrest (standard) and a Prolite3 (short) and done well. I'd prefer to stay with closed cell pads since I don't like inflators. What's my solution to get below 0dF with closed cells and warm hips.
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...ask for the old paths, where is the good way, and walk therein... (Jeremiah)