K2 Cortex 140 Zonal BOA® Men's Ski Boots 2026
Precision and power for expert skiers.
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.
Best For:
Freeride
Big Mountain
Powder
Speed
Size
22.5, 23.5, 24.5, 25.5, 26.5, 27.5, 28.5
Gender
Men's, Women's
Category
All Mountain, 2 Piece
Ability
Expert
Category
BOA® Fit System
Collection
Cortex, BOA®
Width
96mm, 98mm
Ski Boot Liner
EliteFit Pro
Flex/Feel:
Liner
EliteFit Pro
The EliteFit Pro liner delivers a performance-driven fit with precision-mapped support zones and thermoformable foam for custom comfort. Designed for expert skiers who demand responsiveness and foot retention.
Adjustable Liner Tongue
Tongue is attached with velcro in the toe box and can be adjusted to help provide the optimum fit across the top of the foot
Strap
45MM Elasticated Cam Buckle Strap
This wide, elasticated cam buckle strap provides dynamic power transmission with slight give for comfort during flex. It locks the cuff securely for aggressive skiing while allowing natural ankle movement.
Outsole
GripWalk Outsoles
Removable and interchangeable ISO 23223 alpine rockered soles collaboratively 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. Preinstalled.
Features
Fastfit Instep
Integrated Tech Fittings
MultiFit™ Last
BOA® boots with multi-fit last allow for a greater range of foot shapes to fit within the same shell family. Multi last boots are offered in three different volumes, low volume (Cortex) medium (Recon, Anthem and Mindbender) and high (BFC).
Fully Heat-Moldable
Closure
BOA® Fit System
The BOA® Fit System delivers dialed in performance and a micro-adjustable precision fit, engineered & guaranteed to perform in the toughest conditions. It consists of three integral parts: a micro-adjustable dial, lightweight yet extremely strong laces and low-friction lace guides, which are applied in uniquely designed configurations to improve the fit and performance of the boot.
True LV Fit
Energy Bolt Spine
Liner featuring Ski Edge Sensitivity Shims
Ski Edge Sensitivity allow the skier to tune edge initiation of the ski.
SES Shims on Medial side of liner Cuff produce more inside edge angle. Skis feel more reactive and quicker to edge, excellent for slower more precise skiing.
SES Shims on the Lateral side of liner Cuff produce less inside edge angle. Skis feel more controlled and more stable, excellent for higher speeds.
Full Lace Up Liner
Lace up liner for the optimal liner fit
Dual Cuff Alignment
| SHELL LENGH (mm) | MONDO POINT | US SIZES - MEN | US SIZES - WOMEN | EU. ADULT | UK ADULT |
|---|---|---|---|---|---|
| 264 | 22.5 | - | 5.5 | 36 | 3.5 |
| 274 | 23.5 | - | 6.5 | 37.5 | 4.5 |
| 284 | 24.5 | 6.5 | 7.5 | 39 | 5.5 |
| 294 | 25.5 | 7.5 | 8.5 | 40 | 6.5 |
| 304 | 26.5 | 8.5 | 9.5 | 41.5 | 7.5 |
| 314 | 27.5 | 9.5 | 10.5 | 42.5 | 8.5 |
| 324 | 28.5 | 10.5 | - | 44 | 9.5 |