K2 Women's Cortex 85 BOA
K2 Women's Cortex 85 BOA
K2 Women's Cortex 85 BOA
K2 Women's Cortex 85 BOA
K2 Women's Cortex 85 BOA
K2 Women's Cortex 85 BOA
K2 Women's Cortex 85 BOA
K2 Women's Cortex 85 BOA
K2 Women's Cortex 85 BOA
K2 Women's Cortex 85 BOA
K2 Women's Cortex 85 BOA
K2 Women's Cortex 85 BOA
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K2 Women's Cortex 85 BOA

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Cortex 85 BOA Women's Ski Boots 2027

Freeride DNA meets a forgiving flex. The Cortex 85 BOA® W is built for women progressing into all-mountain skiing who want precision without giving up control. A true low-volume women's fit, BOA® micro-adjustability for a precise wrap keeps you balanced and confident. Ski longer, smile bigger, push further — your new go-to for big days on the hill.

85 Flex — Forgiving All-Mountain
"Freeride DNA meets a forgiving flex" — the 85 flex is approachable for intermediate women skiers who want to progress into all-mountain charging. Stiff enough to drive wider skis through variable conditions, with enough forgiveness for skiers still building technique.
BOA® Fit System
"BOA® micro-adjustability for a precise wrap keeps you balanced and confident." The glove-friendly polymer dial tightens evenly across the lower shell, with steel lace and guides for long-term durability.
True Low-Volume 96mm Last
"A true low-volume women's fit" — the 96mm last is the tightest fit in the women's line. Designed for women with narrow to medium-volume feet who prioritize precision over roominess. The lower-volume fit delivers direct power transfer and edge-to-edge response for technical skiing.
EliteFit Plus Liner
EliteFit Plus liner is the premium liner tier in the Cortex line — high-density foam construction with heat-moldable customization. Pre-shaped ankle pockets and a pre-formed tongue reduce break-in time, and the heat-moldable foam holds its shape through years of aggressive skiing.
Freeride DNA
"Freeride DNA" — the Cortex line shares the engineering DNA of K2's high-end freeride boots. The 85 flex and 96mm last are the entry-level option in the Cortex family, giving intermediate skiers access to the same boot platform that advanced skiers use.

General

Category
Ski Boots
Gender
Women's
Ability Level
Intermediate
Collection
Cortex, BOA® Fit System

Fit & Sizing

Last Width
96mm (Low Volume)
Flex Rating
85
Mondo Sizes
22.5, 23.5, 24.5, 25.5, 26.5

Construction

Shell
2-Piece Overlap (women's-specific)
Closure System
BOA® Fit System
Liner
EliteFit Plus (heat-moldable)

Compatibility

Binding Types
Alpine, GripWalk, MNC
DIN Range
3 – 10
Drying
Remove liners after each use and air dry at room temperature away from direct heat. Buckles and BOA dials should be stored open or loosely closed to allow airflow and prevent shell deformation. Never use a hair dryer or place boots on a radiator.
Shell Cleaning
Wipe the shell with a damp cloth to remove dirt and salt. Use a mild soap if needed. Avoid harsh solvents that can damage the shell material or BOA components. Pay special attention to the BOA dial and lace area to keep the closure mechanism clean.
Liner Care
Remove EliteFit Plus liners periodically for full air-drying. Hand-wash with lukewarm water and mild soap, then air-dry completely. Never machine wash or tumble dry. A boot fitter can heat-mold the liner for a more custom fit if pressure points develop.
Storage
Store in a cool, dry place away from direct sunlight. Buckles and BOA dials should be left loose during long-term storage. For off-season, slip a boot tree or rolled magazine into each shell to maintain shape.

Shipping Policy

Components:

All component items (wheels, drivetrains, suspension, brakes, etc.) ship within 4-7 business days of purchase.

Bicycles:

Complete bikes typically ship within 2–3 weeks due to build, tuning, and inspection times. You will receive tracking information as soon as your order is ready to ship.

 Gear & Apparel:

Outdoor Gear and apparel orders (helmets, jerseys, gloves, etc.) ship within 5-21 business days. Please reach out to us with the most up to date deliveries times as they vary per Manufacturer. 

Returns & Exchanges:

If you received the wrong size or wish to exchange an item, it must be returned in original condition—unused, uninstalled, and with all packaging intact.

For full details, please see our Refund Policy before initiating a return.

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Cortex 85 BOA Women's Ski Boots 2027 — Fit + Tech Block
Fit + Tech Cortex 85 BOA Women's Ski Boots 2027
85 Flex BOA® Fit 96mm Last
📐 Find Your Fit
Mondo US Women's EU UK
22.55.5363.5
23.56.537.54.5
24.57.5395.5
25.58.5406.5
26.59.541.57.5

The Cortex 85 runs in 22.5-26.5 mondo — covering women's US 5.5 through 9.5. The 96mm "true low-volume women's fit" is the tightest last in the women's line, designed for women with narrow to medium-volume feet who prioritize precision. "Built for women progressing into all-mountain skiing who want precision without giving up control."

🔩 Component Breakdown
85 Flex — Forgiving All-Mountain
"Freeride DNA meets a forgiving flex" — the 85 flex is approachable for intermediate women skiers who want to progress into all-mountain charging. Stiff enough to drive wider skis through variable conditions, with enough forgiveness for skiers still building technique.
BOA® Fit System
"BOA® micro-adjustability for a precise wrap keeps you balanced and confident." The glove-friendly polymer dial tightens evenly across the lower shell, with steel lace and guides for long-term durability. One-handed operation on the chairlift — dial in the fit without removing gloves.
True Low-Volume 96mm Last
"A true low-volume women's fit" — the 96mm last is the tightest fit in the women's line. Designed for women with narrow to medium-volume feet who prioritize precision over roominess. The lower-volume fit delivers direct power transfer and edge-to-edge response for technical skiing.
EliteFit Plus Liner
EliteFit Plus liner is the premium liner tier in the Cortex line — high-density foam construction with heat-moldable customization. Pre-shaped ankle pockets and a pre-formed tongue reduce break-in time, and the heat-moldable foam holds its shape through years of aggressive skiing.
2-Piece Overlap Construction
Classic 2-piece overlap design with a replaceable sole. The overlap delivers direct power transfer from cuff to shell for solid edge-to-edge response, and the lower shell opens wide for easy entry on cold mornings with a frozen buckle.
Freeride DNA
"Freeride DNA" — the Cortex line shares the engineering DNA of K2's high-end freeride boots. The 85 flex and 96mm last are the entry-level option in the Cortex family, giving intermediate skiers access to the same boot platform that advanced skiers use.
Women's-Specific Architecture
Built around a women's-specific last and cuff geometry — narrower heel pocket, lower instep, and a more accommodating toe box than unisex boots at the same flex. The lower cuff height matches women's lower calf geometry, so the boot doesn't dig into the back of the leg when flexing forward.
Cortex Collection
Part of the Cortex collection — K2's women's line of high-performance all-mountain/freeride boots. The Cortex 85 BOA is the entry-level flex option for intermediate women skiers who want precision and control without giving up comfort.
Compatibility
  • Alpine (ISO 5355) — standard alpine bindings
  • GripWalk (ISO 9523) — modern alpine bindings with GW-compatible AFD
  • MNC (Multi-Norm Certified) — most modern bindings
  • Recommended DIN range: 3-10 (intermediate women skier weights)
  • Walk/ski mode: no walk mode — resort-focused construction for charging
  • No special tools required for binding mounting at your local shop
In the Box
  • 1× Cortex 85 BOA shell + cuff (assembled, mondo as ordered)
  • 1× EliteFit Plus liner (pre-installed, heat-moldable)
  • 1× BOA dial and steel lace system (pre-installed)
  • 1× Power strap (pre-installed)
  • 1× K2 warranty card + owner's manual
  • No additional tools required — fully assembled and ready to mount
🎯 Rider Profile
Flex Rating
Best For Freeride, Powder, Piste, Big Mountain, Speed
Skill Level Intermediate
Ride Style All-Mountain / Freeride
🏔️ Freeride DNA Meets a Forgiving Flex — The Cortex 85 BOA® W is built for women progressing into all-mountain skiing who want precision without giving up control. True low-volume 96mm women's fit, BOA® micro-adjustability, EliteFit Plus liner, 2-piece overlap construction, 5 size options (22.5-26.5) for intermediate women skiers. "Ski longer, smile bigger, push further."

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.

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