The Ducan BOA® High is a technical hiking shoe for outdoor enthusiasts who demand performance. The BOA® Fit System allows a customized fit. Simply turn the dial for extremely precise adjustment – with just one hand, any time and any place. Mammut Flextron Technology® supports the natural rolling movement of the foot for more efficient use of energy when hiking, while Mammut Georganic 3D Technology® guarantees maximum comfort. All parts in contact with the foot are anatomically shaped with great precision. Optimized for hiking: a Vibram® rubber blend for secure grip on outdoor surfaces and a sole design that supports self-cleaning. The waterproof Gore-Tex® membrane keeps your feet dry.