Last: 98 mm – A narrow last designed for utmost precision and/or lower volume feet.

Flex: 125 – A very stiff flex designed for expert or heavier skiers.

Powerfit Pro Tour Liner – Pre-molded and lasted with Ultralon heat-moldable foam. Featuring a stiffer foam and a stiff, asymmetric tongue for added power and energy transmission, pre-molded ankle pockets, and a high-density power collar. Includes a tour notch at the back of the ankle for increased comfort and range of motion while hiking and skinning.

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.

Pebax Cuff – Lightweight, eco-friendly material used in the cuff of select boot models for energetic and consistent flex across a wide range of temperatures.

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.

Cam Booster Strap – Booster Straps provide maximum ski boot performance, increased control and shin protecting shock-absorption.

Power Plate

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.