Cortex 140 Zonal BOA boots 2026

About K2 Cortex 140 Zonal BOA boots 2026

Introducing the all-new Cortex 140 BOA® — the result of your favorite race boot crashing a K2 party. It’s a high-performance mashup of race precision and freeride freedom, engineered for those who want to dominate the resort and beyond.

Need proof? Max Hitzig won the 2024 Freeride World Tour riding a prototype of this boot.

This is, without question, the highest-performance ski boot K2 has ever built.

FEATURES

Flex
140 – An exceptionally stiff flex designed for expert skiers seeking maximum power, precision, and support.

Last
MultiFit™ 96–98 mm – A true low-volume fit with a narrow heel and ankle while preserving additional room around the forefoot and toes for lasting performance comfort.

EliteFit Pro liner
Precision-mapped support zones and thermoformable foam provide a responsive, secure fit with strong foot retention and personalized comfort.

Adjustable liner tongue
Velcro attachment inside the toe box allows the tongue position to be adjusted for a better fit across the top of the foot.

BOA® Fit System
A micro-adjustable dial, durable lightweight laces, and low-friction guides provide precise closure and dependable performance in demanding conditions.

Fastfit instep
Softer TPU material around the instep makes stepping into and out of the boot quicker and easier.

Energy Bolt Spine
A bolted rear cuff provides strong rearward support and precise forward flex. Removing the upper bolt creates a more progressive response with slower rebound.

Ski Edge Sensitivity shims
Repositionable liner-cuff shims allow edge initiation to be tuned. Medial placement increases responsiveness, while lateral placement promotes greater stability and control at speed.

Dual cuff alignment
Dual-sided adjustment allows the cuff angle to be fine-tuned by ±2° for improved alignment and control.

Fully heat-moldable
Both the shell and cuff can be heat-molded to accommodate a variety of foot shapes for a customized fit.

Integrated tech fittings
Toe and heel fittings are molded directly into the shell for compatibility with tech and alpine DIN bindings.

45 mm elasticated cam buckle strap
A wide elastic strap secures the cuff and provides dynamic power transmission while allowing slight give for comfort and natural ankle movement.

GripWalk outsoles
Preinstalled, removable ISO 23223 rockered soles improve traction and walking comfort while maintaining reliable power transmission and release performance.

SPECS