Last: 100 mm – Performance medium fit for people with normal width and volume feet.

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

Women's Adjustable Cuff – Allows for quick adjustment of the cuff opening to accommodate a variety of lower leg shapes.

Flex: 105 – A stiff flex suitable for advanced to expert level skiers.

Precisionfit Pro Liner – Pre-molded and lasted with Ultralon heat-moldable foam. Featuring an asymmetric tongue, pre-molded ankle pockets, and a high-density power collar for a firm-but-comfortable performance fit

Shell and Cuff – TPU (Thermoplastic Urethane)

PowerLite Shell – The shell is purpose-built to result in the best skiing, lightest weight boots ever produced. Made with four different stiffnesses of TPU and optimized wall thickness profiling, the Powerlite Shell achieves a paradoxical balance of lightweight agility and power. The resulting boots weigh in as some of the lightest alpine and freeride on the market, yet they ski with all the power and drive of heavier boots.

PowerFuse SpYne – A rear co-injected “Y” shaped design that adds strength and power to the Energy Interlock, the PowerFuse SpYne maximizes fore/aft flex efficiency and lateral stiffness for sustained performance and responsiveness in all terrain. Because of the SpYne, K2 is able to optimize materials in the cuff and shell, eliminating excessive vibrations in rough terrain.

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.

Dual Cuff Alignment – Dual sided cuff alignment for +/-2 degrees of cuff adjustment.

4 Aluminum Micro-Adjustable Lightweight Buckles

Cam Buckle Power 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.