The K2 Anthem X 115 BOA Women’s Ski Boots are built for advanced skiers who want a powerful, precise boot designed around the way women actually stand and move on skis. The stout 115 flex provides the support to drive skis hard at speed, while the BOA Fit System creates an even, micro-adjustable wrap around the foot for quick fit adjustments throughout the day. K2’s women-specific TrueForm Last improves heel retention and overall anatomical fit, while TrueAlign Geometry optimizes ramp angle, forward lean, cuff alignment, and lower-leg positioning for a more natural stance. The 97–100mm Mid Volume MultiFit Last accommodates a range of foot shapes, and the fully heat-moldable shell and cuff offer even more customization. A TPU shell, lightweight PP cuff, and 40mm power strap deliver smooth, responsive power transfer, while the FastFit Instep makes getting in and out easier. Finished with a heat-moldable P4 liner and GripWalk soles, the Anthem X 115 BOA is a hard-charging women’s all-mountain ski boot ready to rip from first chair to last.

Key Specifications

Flex 115

Last 97–100mm MultiFit

Ability Advanced

Volume Medium

Closure BOA® Fit System

Sole GripWalk

TrueForm Last

Women's feet aren't simply scaled-down men's feet. TrueForm Last was developed specifically around female foot anatomy to deliver stronger heel retention, improved comfort, and a more natural fit from the moment the boot goes on.

TrueAlign Geometry

When your stance is balanced, skiing becomes easier and more efficient. TrueAlign Geometry adjusts ramp angle, forward lean, cuff alignment, and lower-leg interface to better match female biomechanics, helping skiers stay naturally centered and confident on snow.

BOA® Fit System

The BOA® Fit System delivers dialed-in performance and a micro-adjustable precision fit, engineered and guaranteed to perform in demanding conditions. It combines a micro-adjustable dial, lightweight yet extremely strong laces, and low-friction lace guides in a configuration designed to improve the fit and performance of the boot.

Mid Volume MultiFit Last

The MultiFit Last was developed in conjunction with the BOA® Fit System to accommodate a variety of foot shapes and ensure a better, more secure fit. The Mid Volume MultiFit Last is ideal for boot widths from 97–100mm.

Fully Heat-Moldable

Both the boot's shell and cuff are capable of being heat-molded to a variety of foot shapes for a true custom fit.

FastFit Instep

Softer TPU material is used in the instep area of the shell for quick and easy entry and exit.

TPU Shell

TPU is the benchmark material for alpine ski boots, delivering a smooth, progressive flex with outstanding durability and dependable performance across a broad range of temperatures. Its balanced feel provides predictable power transfer, strong edge control, and all-day confidence, making it an ideal choice for skiers who value precision without sacrificing comfort.

PP Cuff

Lightweight and durable polypropylene construction delivers consistent flex and reliable support in all conditions, balancing comfort and performance without compromising control.

P4 Liner

The heat-moldable P4 liner combines a PVC outer material, PE mid foam, and an open-cell inner for soft, forgiving cushioning. A supportive 10mm PE tongue adds structure without unnecessary bulk.

40mm Velcro Strap

A versatile 40mm VELCRO® power strap balances ease of adjustment with solid cuff closure, adding extra responsiveness to the boot without unnecessary bulk.

GripWalk Outsoles

Preinstalled removable and interchangeable ISO 23223 GripWalk soles feature a rockered profile designed to provide better grip and added comfort while walking and standing in ski boots without compromising power transmission and release performance with compatible bindings.

Boot Specifications

Ability	Advanced
Flex	115
Boot Volume	Medium
Last	Mid Volume MultiFit — 97–100mm
Fit Technology	TrueForm Last
Geometry	TrueAlign Geometry
Closure	BOA® Fit System
Shell	TPU
Cuff	Polypropylene (PP)
Liner	P4 — Heat Moldable
Power Strap	40mm VELCRO® Strap
Heat Moldable	Shell & Cuff
Instep	FastFit Instep
Outsole	Preinstalled GripWalk — ISO 23223

Ski Boot Size Chart

Mondo	23.5	24.5	25.5
Shell Length	276 mm	284 mm	294 mm
US Men's	—	6.5	7.5
US Women's	6.5	7.5	8.5
EU	37.5	39	40
UK	4.5	5.5	6.5