Premium insulated full rectangular sleeping pad from ThermaRest With state-of-the-art Triangular Core Matrix construction and ThermaCapture technology, the full-rectangular XTherm NXT MAX delivers a whopping 7.3 R-value despite weighing in at just 650 g 1 lbs 7 oz. Put another way, this air bed gives you the best warmth-to-weight ratio of any sleeping pad ever created. It warmer, lighter and thicker than the previous model, which why the XTherm NXT MAX cements the legacy of being the go-to sleeping pad for alpinists, mountaineers and extreme cold expeditions. At 3 inches thick, with horizontal baffles, all-night comfort and support come as standard, while 70D nylon on the bottom ensures the XTherm NXT MAX holds up to extended expedition use. The WingLock Valve allows for rapid inflation and deflation but also intuitive and easy to use on super-cold nights when the gloves are definitely not coming off. If youre after reliable overnight warmth no matter how far the mercury dips - and space in the pack at a premium - theres no finer sleeping pad than the XTherm NXT MAX from ThermaRest.