Last: 100 mm – An average width and volume last fits most feet.

FastFIT Instep – Softer TPU material is used in the instep area of select models' shells for quick and easy entry and exit.

Flex: 100 – Medium flex for lighter and less aggressive skiers

Luxfit Pro Tour Liner – Pre-molded and lasted with Ultralon heat-moldable foam. Features a medium-density foam, pre-molded ankle pockets, and a medium-density collar. Includes a tour notch at the back of the ankle for increased comfort and range of motion while hiking and skinning.

Shell – Thermoplastic Urethane (TPU)

Cuff – Thermoplastic Urethane (TPU)

Powerlite Shell – K2's highest performance shell design, utilizing shell walls of varying thickness and four different types of TPU to provide the ultimate combination of light weight and responsiveness.

Fastfit Instep – Softer TPU material is used in the instep area of select models' shells for quick and easy entry and exit.

Fully Heat-Moldable – Both the boot's shell and cuff are capable of being heat molded to a variety of foot shapes for a truly custom fit.

Powerlock Spyne – A performance-oriented walk mode designed for ski touring that offers a 50-degree range of motion. When in ski mode, Powerlock Spyne provides a powerful and secure connection for uncompromised downhill performance.

Friction Free Cuff Pivot – An easy hinging cuff pivot designed to provide minimal resistance while in walk mode.

40mm Velcro Strap

GripWalk ISO 23223 Outsoles – Removable and interchangeable rockered soles designed to work with GripWalk binding systems for better grip and comfort while walking, standing, and hiking.

Integrated Tech Fittings – Tech fittings in the toe and heel are fully integrated into the shell injection, allowing for compatibility with both tech and DIN bindings.