Ultra 7R Mummy Exped is an ultra-light mattress for extreme cold, up to -30°C. If you have to carry your winter gear in a backpack and not in a pulka, then this mattress is perfect. A point that seems to us also essential is comfort. Beyond its thermal insulation, this mattress is 9 cm thick! For fans of the winter "Fast and Light", skiing, snowshoeing, wherever the equipment should be as light as possible. For mountain, mountaineering and other activities in the Nordic countries. The thermal insulation is ensured, in particular, by a cover in down of 700 Cuin. The Ultra 7R Mummy is equipped with two flat valves. They do not protrude from the mattress for good protection. There is one valve for inflation and another for deflation. The latter is equipped with a non-return valve to deflate and manage the firmness of the mattress.