This is the best backpacking sleeping pad in existence, in my not-so-humble opinion. It is outstandingly warm (r-value of 5.7...it retains 3-4x more heat than most pads) but isn't too hot even in summer. It's amazingly supportive and comfortable, all while only weighing 17 ounces. And it packs down a little bigger than a Nalgene bottle.  Like new condition. I'm selling only because I'm switching to a hammock setup.