K2 Cortex 105 Zonal Boa W Ski Boots 2026
The K2 Cortex 105 Zonal BOA® women's ski boot blends race-boot-level performance with easy entry and all-day comfort. Designed for intermediate skiers charging hard in freeride, big mountain and powder terrain, the Cortex 105 pairs a precision BOA® Fit System and Fastfit instep with a supportive EliteFit Sport liner, GripWalk outsoles and a heat-moldable MultiFit™ shell for a dialed, customizable fit that stays durable season after season.
Key Specs & Fit
Ability
Intermediate
Category
Fit & Construction
Best for
| Available Sizes | 22.5, 23.5, 24.5, 25.5, 26.5, 27.5 |
|---|---|
| Last Width | 96mm, 98mm |
| Liner | EliteFit Sport |
| Outsoles | GripWalk (ISO 23223) — Preinstalled |
| Fit System | BOA® Fit System (micro-adjustable dial & laces) |
| Strap | 45mm Cam Buckle Strap — Non-Elastic Cam Strap (One Piece) |
| Shell | TPU coated top & bottom, Fastfit instep, fully heat-moldable |
| Collection | Cortex, BOA® |
- TPU Coated Top and Bottom for added durability and weather resistance
- EliteFit Sport liner — medium-volume comfort with supportive ankle pockets
- GripWalk rockered outsoles for improved walking grip and comfort
- Fastfit instep for easier entry and exit
- BOA® Fit System for micro-adjustable, precision closure
- MultiFit™ Last for broader foot-shape compatibility
- Fully heat-moldable shell and cuff for a custom fit