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K2 K2 Spyre 100 Ski Boot - Women's 2018/19

K2 K2 Spyre 100 Ski Boot - Women's 2018/19
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These moderate K2 Spyre 100mm Women's flex boots are comfortable and forgiving, yet responsive enough to charge down steep upper mountain trails. The Powerfuse Spyne adds stiffness and strength while you're rallying down groomers, and the Energy Interlock integrates the cuff and shell to deliver a smooth, progressive flex. The Lux Fit Pro liner is fully customizable so you can dial in the perfect fit before you hit the hill, and the removable spoiler lets you further customize these kicks by adjusting the forward lean.

From Evo: "Packed to the cuff with technology, the average width K2 Spyre 100 Ski Boots are sure to make your skiing experience crisper and more comfortable. Ultra-cushy LuxFitPRO liners give you the heat-moldable means for a truly custom fit while the Powerfuse Spyne maximizes the boot's flex efficiency and power transmission to your skis. Live the life of luxury, whether you're shredding pow or moguls with the K2 Spyre 100 Ski Boots buckled to your feet."


- An alpine boot for lapping the resort
- 100 flex is responsive yet forgiving
- 100mm last fits average-sized feet
- Powerfuse Spyne adds strength and stability
- A fully customizable liner lets you dial in a precise fit
- The removable spoiler lets you adjust the forward lean
- TPU soles for secure footing
- The power strap lets you crank it down at the top of a steep slope

Custom Thermo Shell – The shell can be heat molded, punched, ground and customized with your favorite boot fitter for optimized comfort and performance. The shell can be widened up to 6 mm with this process.

Asymmetrical Toe Box – K2 matches the toe box to the natural curvature of your toes for a more precise and comfortable fit.

Navicular Punch – A bump is pre-formed in the navicular area of the medial ankle where many skiers experience pressure.


Skill Level Advanced - Expert
Recommended Use Downhill Skiing
Flex 100 - Stiff
Last 100 mm - Perfect for most average width, average instep height feet.
Forward Lean 14° / 12° with Power Wedge
Shell 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. Energy Interlock – A rivet-free technology that integrates the cuff and shell of the boot. The Interlock stretches when the boot is flexed forward, and the energy is released throughout the turn, creating a smoother, more natural flex than riveted designs.
Cuff Cuff Alignment Index – Dual sided cuff alignment for +/- 2° of cuff adjustment
Liner LuxFitPRO Liner – This heat-moldable liner combines the performance and fit of a traditional PVC liner with the benefits of strategically placed Ultralon EVA foam. Lasted for precise "out-of-the-box" fit the LuxFit Tour also includes heat-moldable Asymmetric Tongues to reduce shin bang and ensure smooth, precise flex initiation. The Power Wedge and Power Collar offer varied forward lean and the upper cuff support needed for taking advantage of challenging conditions. Moldable Asymmetric Tongue Power Wedge Power Collar
Powerstrap 40mm Velcro Powerstrap
Sole Replaceable Outsoles with Padded Mid-Grip, Alpine DIN (ISO 5355), GripWalk® Outsoles Available Separately – New removable and interchangeable ISO 9523 alpine rockered soles for selected K2 boots collaberatively designed to work with Marker's Grip Walk Binding system for better grip and added comfort when walking and standing in boots, but doesn't compromise the power transmission and release function between the boot and binding when skiing.

* Subject to change without notice.