A heavy duty backpacking and alpine hiking shoe with a high tech modern design the alto guide high meet the full spectrum of requirements for expeditions for hiking through snow and ice a gore tex waterproof lining and an elastic gore tex tongue keeps the ankle and foot dry over exposed rock faces and ascents over boulders a very grippy vibram maton sole keeps you seriously grounded finally doubled free sliding heel straps protect the heel and provide support and 3 zone lacing