Originating from the conceptual standpoint of a mountaineering boot, the new and evolved Wölvhammer is lighter, more comfortable, and grippier. The overhauled design features a removable synthetic liner and a three-piece proprietary bottom assembly compatible with flat and clipless pedals. When the cold winter creeps in, Wölvhammer has you covered.- Removable synthetic liner boot for quick drying- 3-piece proprietary bottom assembly is lighter, warmer more walking traction- Aerogel insulation blocks cold cleats and allows use of preferred insoles without sacrificing warmth- 0 to 25F / -18 to -4C Comfort