Thanks to the innovative Triangular Core Matrix construction and ThermaCapture technology, the completely rectangular XTherm NXT MAX achieves an R-value of 7.3 while weighing only 680 g (size Large). In other words, it offers the best warmth-to-weight ratio ever achieved for a rectangular sleeping pad. This mat is warmer, lighter, and thicker than its predecessor, making the XTherm NXT MAX the top choice among rectangular mats for mountain professionals, climbers, and expeditions in extreme cold. With a thickness of 7.6 cm, horizontal chambers, and the larger sleeping area of a rectangular shape, this mat is particularly comfortable and provides good support. The 70D nylon underside ensures that the XTherm NXT MAX withstands extended use. The WingLock valve allows for quick inflation and deflation. It is intuitively designed and can be used even with gloves on.