The world’s lightest, most responsive ski boots are changing the way we ski – and win. The single-piece all-carbon anatomic ‘Active Edge’ skate chassis features extremely light, ‘hard’ sole flex and delivers superior lateral responsiveness and maximum longitudinal stiffness and stability. Carbon cuff-to-heel counter hinge construction delivers ultralight, maximal stiffness, minimal rotational hinge friction and optimal ankle fit. CUFFS The skating technique requires more lateral ankle support for improved performance. So the boot has an externally fixed cuff, which provides rigidity and lateral stability to the ankle, to gain better responsiveness with optimal grip. Cuffs are made of carbon (which are extremely lightweight) or plastic. All are anatomically and ergonomically designed, employ a 'Velcro' power strap (some with EV-padding) and are attached to the heel counter with rivets or screws. FULL CARBON The anatomic full carbon cuff is extremely light and delivers maximal stiffness and superior lateral responsiveness. EVA-padding delivers superior comfort, while the power strap ensures optimal ankle fit and adjustable ankle grip. ONE-PIECE CHASIS CLASSIC ACTIVE EDGE WITH ALPINA SSR CLASSIC SOLE Extremely light anatomic and ergonomic carbon-made Active Edge & soft flex chassis construction with directly integrated TPU-made NNN compatible toe & heel plate. One-piece chassis construction provides maximum longitudinal stiffness and stability, superior responsiveness and power transmission by the foot to the ski, with free heel & adaptable heel pocket construction for minimum heel stress and optimal fit. LACING 45° A braid angle of 45° relative to the longitudinal direction of the shoe improves the torsional stability of the soft part of the shoe. This ensures a tight fit between the shoe and the foot in the rotation phase of the shoe toward the inner side when skiing the skating technique. ANATOMIC FOOTBED Insole contributes significantly to the vertical stability of the foot, providing a high level of comfort and improves the thermal insulation of the shoe. PVC NEOPRENE PVC is strong and lightweight, soft and flexible, and highly durable, while neoprene maintains good flexibility over a wide temperature range and offers good insulation against both wet and cold. ELASTIC INSERT For gaiter adaptability to various lower leg shapes.