K2 Cortex 105 Zonal BOA Ski Boot - 2026 - Women's One Color, 25.5

What Our Gearhead(R) Experts Are Saying:"This boot gives me precision where I want it, and comfort where I need it. The dual BOA system lets me dial the fit separately at the shell and cuff-awesome for all-day resort laps or big mountain lines. It skis like a race boot but without the foot-numbing squeeze."For expert riders who demand power and precision without compromising comfort, the K2 Cortex Zonal 105 BOA(R) Ski Boot is a game-changer. It's engineered with freeride and big mountain skiers in mind-those of us who want elite responsiveness and a locked-in feel that won't leave our feet aching. With the innovative dual BOA(R) Fit System on both the cuff and shell, we can fine-tune fit on the fly, eliminating pressure points while boosting control. The Cortex 105's narrow 96-98mm last and 105 flex deliver a race-inspired feel, while the Fastfit instep and low-volume EliteFit Sport liner ensure we can get in and out easily-even with cold fingers. On the mountain, the Energy Bolt spine enhances rearward support, while SES shims let us adjust edge response for fast, fine-tuned skiing. GripWalk soles come preinstalled for confident walking to the lift or the apres patio.