Women’s K2 Cortex 125 W Zonal BOA® Ski Boots

Exceptional comfort, maximum precision, control on the slopes. Cortex 125 W Zonal BOA® is K2’s most advanced women’s ski boot model, designed for skiers who demand the highest performance in every type of terrain: freeride, big mountain, powder, carving and changing snow conditions.

Why will you love them?

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  Zonal BOA® Fit System (in the liner and cuff) – two BOA® dials enable precise and even adjustment of the boot without pressure points, providing an ideal wrap around the foot and maximum energy transfer.

  
  


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  True LV Fit – the low-volume construction (96–98 mm) is designed for narrower feet while still leaving room in the toe and forefoot areas for all-day comfort.

  
  


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  FastFIT Instep – a soft TPU panel over the instep makes putting on and taking off the boots easier and less stressful.

  
  


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  Dual Cuff Alignment – adjust the lateral cuff position (+/– 2°) to match the boot perfectly to the shape of your calf and your skiing technique.

  
  


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  Energy Bolt Spine – the reinforced rear section of the boot provides a stable flex and efficient energy transfer, with an adjustment option for different flex profiles.

  
  


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  GripWalk Outsoles (ISO 23223) – the contoured, replaceable outsoles provide better grip and comfort when walking, without sacrificing power transferred to the ski.

  
  


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  Liner EliteFit Pro with Ski Edge Sensitivity Shims – a fully laced liner; additional shims allow you to adjust turn initiation for greater inward response or increased stability at higher speeds.

  
  


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  Cam Booster Power Strap – an elastic strap that increases tightening power and the comfort of the upper closure.

  
  


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  H+i1 Dial – a durable, micro-adjustable BOA® dial with a quick-release function and a replaceable insert protected against damage.

  
  


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  Flex 125 – a very stiff flex designed for advanced and expert skiers, providing precision, stability and power on fast descents.

Technical specifications – K2 Cortex 125 W Zonal BOA®

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  Flex: 125 – very stiff, for advanced and expert skiers

  
  


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  Width (last): 96–98 mm (Low Volume Fit – designed for narrower feet)

  
  


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  Closure system: Zonal BOA® – separate dials for the shell and cuff, providing complete fit control

  
  


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  Liner: EliteFit Pro with full lacing + Ski Edge Sensitivity Shims

  
  


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  Cuff adjustment: Dual Cuff Alignment (+/– 2°)

  
  


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  Reinforcement: Energy Bolt Spine – rear-section stability and improved energy transfer

  
  


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  Outsole: GripWalk (ISO 23223) – replaceable, with tread for better grip

  
  


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  Upper strap: Cam Booster Power Strap – stronger tightening and better feel

  
  


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  Putting on the boots: FastFIT Instep – flexible TPU panel in the instep area for easy on and off

  
  


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  BOA® dial: H+i1 – micro-adjustment, quick release and replaceable mechanism

Ideal for…

– Skiers at the Advanced–Expert level who expect maximum control, power and precision.
– Women who enjoy challenging terrain: powder, freeride, big mountain and fast carving.
– Women who value a custom fit, with no compromises between comfort and performance.

K2 Cortex 125 W Zonal BOA® is the most advanced women’s model in the K2 range – a ski boot that revolutionizes fit and control. If you want to ski without compromises, you are in the right place.