Originating from the conceptual standpoint of a mountaineering boot, the new and evolved Wlvhammer 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, Wlvhammer has you covered. - Removable synthetic liner boot for quick drying - 3-piece proprietary bottom assembly is lighter, warmer offers more walking traction - Aerogel insulation blocks cold cleats and allows use of preferred insoles without sacrificing warmth - 0 to 25F / -18 to -4C Comfort