The Tensor Extreme Conditions is an ultra light mattress from Nemo.Weighing just 485g, the Tensor Extreme Conditions is one of the brand's lightest mattresses. It has an amazing weight-to-warmth ratio and is the warmest and best insulated mattress on the market. As well as being lightweight, this is a technical mattress that is also ultra-compressible and comfortable, thanks to its flexibility and excellent stability. This is because the Apex membranes offer excellent load distribution and the increased number of insulating layers are strategically spaced to increase the R-Value to 8.5. When it comes to insulation, 20D Nylon will do the job of giving you optimum insulation while keeping the weight down. It's perfect for use all year round, in all temperatures. The Tensor All-Season has a new multi-functional valve for faster inflation and deflation. A lightweight pump bag is included with this mattress.The Tensor Extreme Conditions is silent, which is much nicer! Its construction and weight make it the mattress of your dreams!