The K2 Recon X 110 BOA Ski Boots give intermediate skiers a performance-focused platform that leaves plenty of room to progress. The approachable 110 flex provides enough support to start skiing faster and driving turns harder without the demanding feel of a stiffer boot, while the BOA Fit System delivers quick micro-adjustments and an even wrap around the foot. K2’s Mid Volume MultiFit Last works with the BOA system to accommodate widths from approximately 97–100mm, creating a secure fit across a range of foot shapes. A durable TPU shell provides smooth, progressive power transfer, while the lightweight PP cuff and 40mm power strap add support without unnecessary bulk. Both the shell and cuff are fully heat moldable, and a softer FastFit Instep makes entry and exit easier. Finished with a heat-moldable P4 liner and GripWalk soles, the Recon X 110 BOA is an all-mountain ski boot built to help progressing skiers push harder, explore more terrain, and keep leveling up.

Key Specifications

Flex 110

Last 97–100mm MultiFit

Ability Intermediate

Closure BOA® Fit System

Shell TPU

Sole GripWalk

BOA® Fit System

The BOA® Fit System delivers dialed-in performance and a micro-adjustable precision fit. A micro-adjustable dial, lightweight yet extremely strong laces, and low-friction lace guides work together 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 while maintaining a secure, performance-oriented fit. The Mid Volume MultiFit Last accommodates boot widths from approximately 97–100mm.

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.

PP Cuff

Lightweight and durable polypropylene construction delivers consistent flex and reliable support in varying conditions, providing comfort and control without unnecessary weight.

Fully Heat-Moldable

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

FastFit Instep

Softer TPU material is used in the instep area of the shell for quicker and easier entry and exit, making it easier to get into and out of the boot.

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 easy adjustment with solid cuff closure, adding extra responsiveness and support 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	Intermediate
Flex	110
Last	Mid Volume MultiFit — 97–100mm
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	25.5	26.5	27.5	28.5	29.5
Shell Length	294 mm	304 mm	314 mm	324 mm	334 mm
US Men's	7.5	8.5	9.5	10.5	11.5
US Women's	8.5	9.5	10.5	—	—
EU	40	41.5	42.5	44	45.5
UK	6.5	7.5	8.5	9.5	10.5