Article code: 22191805
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  • Overview
  • Why endure another season of numb toes and wasted on-snow opportunities due to sore feet? The K2 B.F.C. W 90 Heat Ski Boots offer immediate gratification for your feet and spirit, with a generous 103 mm fit and built in heating capability in the liner.

Product details


Last: 103 mm – Wide and high volume fit for immediate comfort and wider feet.

Hands Free Entry – Dual material overlap for intuitive and easy hands-free exit and entry.

Women's Adjustable Cuff – Rear of cuff is adjustable for varying calf sizes.

Women's Specific Last – A lower cuff height, volume and narrower heel to accommodate women’s lower leg and foot shapes.


Flex: 90 – Medium-stiff flex for intermediate to advanced women skiers.


CushFit Liner – Lasted with a blend of open cell and EVA foam for an extremely comfortable yet supportive fit.

Therm-ic Heat System – Integrated heating system to keep your feet warm on cold days. Increases mobility and performance of foot muscles. Three heat settings provide warmth from 4 to 19 hours. Fully charges in 6 to 7 hours with a USB cable.

Shell Materials & Design

PowerFuse SpYne – A rear co-injected “Y” shaped design that adds strength and power to the Energy Interlock, the PowerFuse SpYne maximizes fore/aft flex efficiency and lateral stiffness for sustained performance and responsiveness in all terrain. Because of the SpYne, K2 is able to optimize materials in the cuff and shell, eliminating excessive vibrations in rough terrain.

Energy Interlock – A rivet-free technology that integrates the cuff and shell, putting less stress on the boot's material and produces a smoother, progressive flex.

Shell and Cuff – TPU (Thermoplastic Urethane)


Cuff Alignment – Dual +/- 1°

Natural Stance / Natural Stride – Supportive flex profile and design for a natural stance when standing in line at the ticket office, tram or chairlift and a natural stride when walking through the parking lot, trudging up the stairs or across the village.

Ski/Walk Mode

Après Mode Walk Mechanism – Unlocks the upper cuff from the lower shell for comfort and convenience while walking from car to lift to apres and beyond, while still allowing to lock down for all-mountain performance.


4 Aluminum Micro-Adjustable Lightweight Buckles

Power Strap

40mm Velcro Powerstrap


Dual Material Replaceable ISO 5355 Outsoles

GripWalk® Outsoles Available Separately – Removable and interchangeable ISO 9523 alpine rockered soles collaboratively designed to work with Marker's GripWalk binding system for better grip and added comfort when walking and standing in boots, but doesn't compromise the power transmission and release function between the boot and binding when skiing.


  • Ability Level:Intermediate-AdvancedMore 
  • Ski Boot Flex:Stiff
  • Forefoot Width:103 mmMore 
  • Liner Type:Semi-Custom
  • Flex Index:90
  • Boot Sole Type:Alpine DIN (ISO 5355)
  • Includes Tech Fittings:No
  • Number of Buckles:4


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