RickD thanks for that. How cold of weather have you used this combination in. You would only have a closed cell foam pad under your legs? As I said I always carry the fan fold CF pad anyway, but I would NEVER consider it as a primary insulation for serious winter work.

I think in the winter - the insulation under you should not be skimped on for weight savings. This is why I carried a 27 ounce down air mattress DAM for 20 years, but the valve assembly on the warmlights is prone to failure in deep cold and I've torn 2 out. Maybe I need to put a custom filler valve on my old DAM.
Jim
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These are my own opinions based on wisdom earned through many wrong decisions. Your mileage may vary.