I was skeptical at first because the description said it was insulated and when I received it, it was rolled up paper-thin. But somehow it works. I have only used it camping with low temps in the 40s so far, but I never had that feeling of all the warmth getting sucked out through the mattress like other inflatables I have used. It is also plenty wide enough for 6'3" dude and the V-shape is surprisingly comfortable.
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