K2 Cortex 105 W Zonal BOA Ski Boots 2026

The K2 Cortex 105 W Zonal BOA Ski Boots 2026 are a low‑volume, women’s‑specific all‑mountain/freeride boot with dual BOA closure, built for advanced to expert skiers who want precise, race‑like response with a highly tuneable fit.

The Cortex 105 W Zonal BOA sits in K2’s new low‑volume Cortex line, aimed at powerful skiers who want a locked‑in fit without the faff of traditional buckles. K2’s MultiFit last in the Cortex platform targets narrower feet, offering a 96–98 mm fit that can be customised thanks to a fully heat‑mouldable shell and EliteFit Sport liner. Dual (zonal) BOA dials independently tension the lower shell and upper cuff, wrapping the foot and shin evenly for improved edge sensitivity and reduced pressure points, and making it easy to fine‑tune tightness run to run. A TPU shell and cuff, non‑elastic cam strap and Energy Bolt‑style spine focus on direct power transfer rather than touring versatility, so the boot feels solid and progressive when you’re driving modern all‑mountain skis at speed. GripWalk soles round things out with confident grip when you’re stomping around the carpark or hiking onto ridgelines.

• Zonal BOA closure: Dual BOA dials independently close the forefoot and cuff, giving micro‑adjustable fit and uniform pressure over both foot and lower leg for better control.
• MultiFit low‑volume last: 96–98 mm shell width is tuned for narrower feet but designed to accommodate a range of shapes once heat moulded.
• EliteFit Sport liner: Lace‑up liner with adjustable tongue offers a precise, locked‑in feel and can be heat‑moulded for custom comfort.
• FastFIT instep: Softer instep material helps with easier entry and exit while keeping a close, performance‑focused wrap over the midfoot.
• Dual cuff alignment: Cuff adjustment lets you better match the boot to your leg shaft for more neutral edging and reduced knee strain.
• GripWalk outsoles: Rockered, replaceable soles compatible with GripWalk bindings improve walking comfort and traction on icy or uneven surfaces.