Ultra 5R Mummy Exped is an ultra-light, 4-season mattress that can be used up to -20°C. For those who want a mattress for comfort, with a minimum weight, a very compact folded volume for fast and light hikes. 445 grams in size 183 cm, for an insulated rectangular mattress of 7 cm thick, Exped is strong! Comfort is ensured by its thickness and thermal insulation with an R-value of 4.8. Exped uses a 160 g/m² Texpedloft synthetic microfiber that is laminated to avoid settling in time. The Ultra 5R 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.