In reply to UKC Gear: Very interesting product, but no mention of how it actually feels to sleep on, and how it deals with moving body position when lying down. I would also like to know how durable it is likely to be. My Thermarest prolite 3 short is utterly wonderful and very well built with tough fabrics and chunky seams, but still only weighs 370g. If this Klymit mat is as tough and comfy, then it'll be a winner!