This 100mm medium last boot uses next-generation Prolite construction, which starts with the lightest profile possible and then adds reinforcement to key energy zones to create a super robust boot that delivers supremely powerful skiing. Fully customizable, the boot features special heat-moldable Memory Fit Shell and Mimic liner technologies that form to fit the exact shape of the foot. A removable Adaptive Fit System (AFS) Cuff spoiler increases the amount of tulip-shape and volume inside of the cuff to accommodate different sized calves. With 54º range of motion, the cuff delivers epic natural movement for easy walking and more comfort when standing upright. A GripWalk Sole is compatible with all GripWalk, MN, MNC and Pin bindings. Features: 3D Ankle & Heel: A pre-formed, anatomical ankle & heel area provides a precise & comfortable fit. Adaptive Fit System (AFS) Cuff: A removeable cuff spoiler that increases the amount of tulip-shape and volume inside of the cuff. Memory Fit: Advanced heat-fitting technology creates a fully personalized shell, cuff and liner in minutes.