Thanks to the innovative Triangular Core Matrix construction and ThermaCapture technology, the XTherm NXT offers an R-value of 7.3 while weighing only 440 g in the Regular size. In other words, it has the best warmth-to-weight ratio of any sleeping pad ever developed. It is warmer and thicker than its predecessor, making the XTherm NXT the top choice for alpinists, climbers, and extreme cold expeditions. With a thickness of 3 inches and horizontal baffles, the XTherm NXT provides comfort and support throughout the night, while the 70D nylon on the bottom ensures durability even on longer expeditions. The WingLock valve allows for quick inflation and deflation and is intuitive and easy to use even in icy weather, without needing to take off your gloves. When reliable warmth is needed at night, no matter how low the mercury drops, and space in your backpack is tight, there is no better sleeping pad than the XTherm NXT.