Dura 8R Exped is a particularly strong inflatable mattress for the most engaged expeditions. For temperatures up to -40C. It’s a real four-season mattress. For Tentes 4 Saisons, this mattress is the one to have if you leave for a long time in an isolated environment. It is perfect for expeditions, adventures where the equipment is put to the test. Although it is not the lightest and most compact for winter temperatures, it is the most reliable. Its outer fabric is particularly robust. The thermal insulation is ensured, in particular, by a cover in down of 700 Cuin. It 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.