The Altai is the centerpiece of Nidecker&';s boot collection, offering premium performance, comfort, and support. Built around an asymmetrical upper that naturally follows the contours of the foot to eliminate pressure points, it features dual H5 Boa dials that allow riders to fine-tune the upper and lower closure zones independently. Its responsive, mid-stiff flex delivers instant edge-to-edge power transfer, making it ideal for laying down carves on hardpack, hunting powder in the trees, or charging steep lines. Best Use: All-Mountain, Freeride, Carving Ability Level: Intermediate - Advanced Flex Rating: Medium - Stiff (6 out of 10) Lacing System: Dual-Zone Boa (H5 Coiler) Outsole: Ascent 2.0 EVA and Rubber Binding Compatibility: Traditional Strap-In and Supermatic Footbed: 3D Pro Insole Materials: PU/TPU Upper, 100% PFAS-Free Construction Dual-Zone H5 Boa Fit System: Upgraded H5 Coiler technology delivers precise, bi-directional micro-adjustability across separate upper and lower zones, letting riders lock in heel hold while maintaining flex over the instep. Asymmetrical Shell Design: Ergonomically engineered to eliminate pinch points and align with the calf&';s natural angle, distributing lace tension evenly for all-day comfort. Ascent 2.0 Outsole: Redesigned lightweight sole combines shock-absorbing EVA with durable, high-traction rubber treads for reliable grip on ice, rocky bootpacks, and seamless engagement with Supermatic bindings. Responsive All-Mountain Support: Engineered with a supportive lateral and medial flex profile to provide direct energy transfer to the edges while maintaining enough forgiveness for surfy turns and natural articulation. 3D Pro Insole: Pre-molded anatomical footbed provides targeted arch support and heel stabilization, dampening heavy landings and reducing foot fatigue throughout long riding days.