The 6000 DENALI EVO RR mountaineering boots have been designed for expeditions up to 6000 m; the removable inner bootee offers excellent thermal insulation; protecting the feet against the cold. This model has been certified by the CIMAC institute for temperatures up to -25°C (in a static environment); but the mountaineer can brave colder temperatures up to -40°C when moving. These boots are ideal for high altitudes: the high gaiter; the YKK zip and the upper in Cordura® and microfibre are an impenetrable barrier against water and snow. These boots are manufactured using the best technology that the footwear industry has to offer providing the mountaineer with the best possible shock absorbency; lightness and grip. To combat wear and tear the Vibram® Penia outsole guarantees the correct combination of support and sensitivity and the new carbon fibre insole offers a superior rigidity; lightness and thermal insulation. These boots are compatible with step-in crampons making them suitable for icy and snowy routes and mixed rock and glacier terrains.