Alpineduroat heart the alpineduro is a rugged mountain shoe with a grippy vibram rubber outsole insulated construction and a clip in pedal ready nylon shank that doesn39t sacrifice walking comfort or grip a better connection to the pedals regardless of the weatherat heart the alpineduro is a rugged mountain shoe with a grippy vibram rubber outsole insulated construction and a clip in pedal ready nylon shank that doesn39t sacrifice walking comfort or grip on the outside its an urban adven