K2 Cortex 140 Zonal BOA Ski Boots 2026
Model Info
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Product Info
The K2 Cortex 140 Zonal BOA Ski Boots set a new benchmark for performance and fit with a dual BOA design that delivers micro-adjustable precision across both cuff and shell. The all new BOA cuff is engineered to distribute pressure more consistently around the lower leg for improved flex and response, and with less fiddling to find the sweet spot. On the inside, this140-flex ripper combines a true low-volume fit with a full-lace liner to keep your feet happy from first lap to final descent. For skiers who demand surgical control and instant response without sacrificing comfort, the Cortex 140 leads the pack.
Product Details
Fit
MultiFIT Last: 96-98 mm – The MultiFit Last was developed in conjunction with the BOA® Fit System to accommodate a variety of narrower foot shapes ranging from 96mm to 98mm.
FastFIT Instep – Softer TPU material is used in the instep area of select models' shells for quick and easy entry and exit.
Dual Cuff Alignment
Fully Heat Moldable
Adjustable Rear Cuff Spoiler
Flex
Flex: 140 – A very stiff flex for the most aggressive expert skiers.
Liner
EliteFit Pro Liner – Full lace up liner with an adjustable tongue.
Ski Edge Sensitivity Shims
Shell Materials & Design
Shell – TPU
Cuff – TPU
Energy Bolt Spine
Powerplate
Buckles
BOA® Fit System – The BOA® Fit System provides a performance fit engineered to enhance feel and responsiveness while reducing pressure points by incrementally modulating the Alpine boot closure with precise micro-adjustments.
H+i1 DIAL – Provides micro-adjustable, precision fit and quick release, with quality and durability guaranteed. The BOA dial platform features a breakaway design engineered to eject the dial cartridge upon severe impact without damaging the system, allowing skiers to pop the dial back into the bayonet midmountain. In the unlikely event that the system is broken, it can be easily repaired and replaced.
Power Strap
Cam Booster Powerstrap
Sole
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.
Integrated Tech Toe Fittings
Specs
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Ability Level:
Advanced-Expert
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Ability Level
Advanced-Expert Whether you charge the steepest lines, hit the biggest jumps in the park or carve with race-like precision, advanced to expert level skis, snowboards, boots and bindings are for the more aggressive rider. In skis and snowboards, you'll often find layers of metal, carbon or other stringers for rigidity and power, while advanced to expert level boots and bindings are usually on the stiffer side of the spectrum for rebound and precision steering.
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Ski Boot Flex:
Very Stiff
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Forefoot Width:
98 mm
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Forefoot Width
98 mm Forefoot width, or last, is the reference width for this model based off shell size 26/26.5. Larger or smaller shell sizes will diverge from this reference width in increments of 2mm for every full size. - Liner Type: Custom
- Flex Index: 140
- Boot Sole Type: GripWalk (ISO 23223), Tech Toe Only
- Includes Tech Fittings: Yes
- BOA®: Yes
- Number of Buckles: Dual BOA
- Touring UsedFor: Burly
- Series: Cortex
- Warranty: 1 Year
