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

Flex: 130 – A very stiff flex designed for expert or heavier skiers.

Powerfit Pro 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.

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.

Energy Interlock – A rivet-free technology that integrates the cuff and shell, putting less stress on the boot's lower shell and producing a smooth, progressive flex.

Powerfuse Spyne – A co-injected Y-shaped support in the rear of the boot that adds strength and power to the Energy Interlock in order to maximize fore/aft flex efficiency and lateral stiffness, providing enhanced responsiveness and energy transfer to the ski.

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.

TPU Cuff

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

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.