A boot that powerfully blends modern, high-performance freeride and classic alpine touring. The next step beyond last years Spirit 3, the Spirit 4 adds one more buckle and more support. This boot will allow you to ski some of the fattest skis on the market with Dynafit Bindings. Features: Dual-density cuff and foot for optimal support and drive 4 Easy Lock buckles with power strap for maximum control Compatible with ALL alpine touring bindings, including Dynafit® Ski/walk mechanism is easy to engage and provides maximum touring flex Adjustable forward lean; two settings available with 4˚ difference Overlap cuff for maximum power Heel Retention System securely locks the ankle and heel Lateral cant adjustment for optimal edge control and precise adjustment Intuition thermo-moldable liners for perfect fit and comfort Removable spoiler for extra forward lean **Note: please read Spirit 4 instructions prior to mounting Dynafit bindings; unique instructions are required due to the touring-optimized toe insert location. Specs: Inner Boot: Intuition Precision High Shell: Pebax® Cuff: Pebax® Tongue: Pebax® Buckles: 4 + Power Strap Forward Lean: 19˚-23˚ (+/- 2˚) Sole: Active SCARPA/Skywalk® Weight: 1870 grams, 4lbs 1oz (Size 27) Size: 24.5-31 Binding System: Dynafit, Fritschi, Naxo, Silvretta Color: Yellow