Fit + Tech
Cortex 105 Zonal BOA® Women's Ski Boot 2027
Mondo 22.5 – 27.5
Women's
Flex 105 · Zonal BOA®
Find Your Fit
| Mondo | US Women's | US Men's | UK | Euro |
|---|---|---|---|---|
| 22.5 | 5.5 | 4 | 3.5 | 35.5 |
| 23.5 | 6.5 | 5 | 4.5 | 36.5 |
| 24.5 | 7.5 | 6 | 5.5 | 38 |
| 25.5 | 8.5 | 7 | 6.5 | 39 |
| 26.5 | 9.5 | 8 | 7.5 | 40 |
| 27.5 | 10.5 | 9 | 8.5 | 42 |
All Mondos are cm foot length. Conversion: Women's = Men's + 1 size (ski boot convention). 6 sizes from Mondo 22.5 through 27.5 in half-Mondo steps. The Cortex 105 Zonal BOA is the premium-tier version of the Cortex 105 lineup — same LV Shell + Multizone Dual Core + Elite Fit Liner components as the standard Cortex 105 BOA, but with the dual-dial Zonal BOA® Fit System for even better wrap and micro-adjustability. Compatible with all standard alpine ski bindings (ISO 5355 / GripWalk soles).
Component Breakdown
Zonal BOA® Fit System — Even, Custom Wrap
Zonal BOA® Fit System — two separate BOA® dials for independent upper and lower zone tightening. Delivers an even, custom wrap across the entire boot — micro-adjustable on the fly for precise pressure distribution.
True LV Women's Fit
True LV (Low Volume) Women's Fit — race-boot-level performance in a women's-specific build. Lower volume last, narrower heel pocket, and shorter cuff height for the female foot and leg proportions.
LV Shell — Race-Boot-Level Response
LV Shell delivers race-boot-level response without the premium packaging weight. Lightweight construction for a 105 flex — efficient energy transfer from the legs through the boot to the ski.
Multizone Dual Core
Multizone Dual Core — Poplar + Beech with tapers between the insert packs for a more forgiving flex. Tuned for women's progression and responsiveness.
Elite Fit Liner
Elite Fit Liner — precise foot wrap and responsive energy transfer. Heat-moldable for custom fit — conforms to individual foot shape over time. Premium construction for the high-output skier.
FastFit — No Wrestling in the Parking Lot
FastFit makes the boot easy to get in and out of — wide throat for sliding the foot in without fighting the boot. Combined with the Zonal BOA® closure, getting in and out is quick and painless.
SuperDrive™ ADV Sintrured Base
SuperDrive™ ADV sintrured base — combines the durability of extruded with the hardness of sintered. Higher pressure and temperature in manufacturing creates surface hardness near most sintered bases — more durable when jibbing and ripping while retaining low maintenance.
Best For: Freeride, Big Mountain, Powder, Speed
Per the page, the Cortex Zonal 105 BOA® W is best for Freeride, Big Mountain, Powder, and Speed — "race-boot-level response in a true LV women's fit." Versatile high-performance coverage.
Mounting & Compatibility
- Compatible with all ISO 5355 alpine ski bindings
- Compatible with all GripWalk (ISO 23223) bindings
- Standard 30mm ski boot hole pattern — fits all alpine bindings
- DIN setting range: typically 3-12 for this flex (check binding specs)
- Forward lean adjustable via rear spoiler (check manual)
In the Box
- 1× K2 Cortex 105 Zonal BOA® W ski boot (left or right, Mondo size as ordered)
- 1× Boot bag / storage sack
- BOA® laces installed (no extra included)
- GripWalk sole pads pre-installed
Rider Profile
Flex Rating
Best For
Freeride, Big Mountain, Powder, Speed
Skill Level
Advanced – Expert
Fit System
Zonal BOA®
Lightweight, Powerful, and Responsive — Zonal BOA® Fit System + True LV Women's Fit + 105 Flex + FastFit entry — race-boot-level response without the wrestling match. Still charging when your crew calls it.
Prepared with intention.
Every product is carefully inspected and handled by our team before it ships. From fit and function to final details, we make sure each piece is ready for the outdoors ahead—so you can focus on the experience, not the gear.
Passion drives us
At SpokeX Bike Co., bikes aren't just our business — they’re our way of life. As a rider-owned and operated shop, every decision we make comes from firsthand experience on the trail, at the race, and on the open road. We know what it’s like to chase a new line, push through the pain cave, and celebrate the ride — because we live it every day.
