Setting the bar as the global best-seller for ski mountaineering training and racing boots, the Alien 1.0 represents the best blend of durability, functionality and weight savings. The hand-laid carbon fiber cuff is super stiff and crazy light, while the Carbon Grilamid® LFT shell increases durability with minimal weight gain overhand laid carbon fiber. The Speed Lock Lite ski-walk mechanism is integrated with the cuff closure via a Dyneema® cord, for quick, single-action transitions. The floating BOA® closure system ensures quick, easy and durable fit tensioning, and is protected by a reinforced gaiter that keeps snow out. The Vibram® outsole ensures traction on the snow for mandatory boot pack sections, while Qick Step-In fittings make clicking a breeze. If skimo racing is your passion, maximize your potential with the Alien 1.0.