Product Description Inbounds powder laps or exploring the back bowls, the Alltrack Pro 100 MV is designed to ski the whole mountain. A releasable cuff offers a natural range of motion for hiking and a 100mm last balances comfort and control. The Generative Design Grid shell is engineered for reduced weight and full power transmission in all-conditions and terrain. The full custom liner is thermo-moldable for a precise fit. Additional Details and Features Medium Fit - Medium fit features a 100mm last for a precise, comfortable fit that balances comfort and control Lightweight, Full Power - Generative Design Grid minimizes boot wall thickness for the most effective use of material to reduce weight and enhance power transfer Better Skiability, Better Fit - Dual Core technology provides targeted power transmission and shell wrapping, resulting in livelier rebound, response and control Optimized Hike Mode - The lower boot shell is designed to offer a 50-degree range of motion in walk mode for efficient touring and maximum power for skiing when in ski mode Custom Comfort and Precision - Full custom liners are 100% customizable for enhanced comfort, precision, and power transmission Insulated Warmth and Support - Thinsulate(TM) Stretch insulates while providing enhanced foot support for better skiability GRIPWALK(R) Compatible (sold separately) - GRIPWALK(R) soles feature a rubber tread and rockered toe for a more natural walking motion and increased traction