Therm-a-Rest NeoAir XTherm NXT MAX L

Thanks to the innovative Triangular Core Matrix construction and ThermaCapture technology, the XTherm Nxt Max offers an R-value of 7.3 at a weight of just 680 g in size Large. In other words, it has the best warmth-to-weight ratio of any rectangular sleeping pad ever developed. It is warmer and thicker than its predecessor, making the XTherm Nxt Max the best rectangular sleeping pad for mountaineers, climbers, and extreme cold expeditions. With a thickness of 3 inches, horizontal air channels, and the additional sleeping surface of its rectangular shape, the XTherm Nxt Max provides comfort and support throughout the night, while the 70D nylon on the bottom ensures that it can withstand extended expedition use. The WingLock valve allows for quick inflation and deflation and is intuitive and easy to use even in icy weather, without having to remove your gloves. If you need to stay warm regardless of the weather, desire a large sleeping area, but are short on space in your backpack, there is no better sleeping pad than the XTherm Nxt Max.