Premium high leg Alpine lace-up boot for high-altitude mountaineering activities, ice & snow, skilfully crafted using only the best materials.3.0mm Perwanger leather upper with a Sympatex 100% waterproof membrane, windproof and highly breathable. Rubber rand for enhanced protection of the leather upper. Additional arch support, maximum stability, and stiff flex. The Bionico Teton Cramp features a unique A.F.C.F. crampon frame combined with a T.S.S.L. Soft Midsole Control System midsole, delivering great comfort and control.Ultra-rugged Vibram Teton rubber outsole for great grip and traction with a low impact midsole.