Skip to content
2–5 day deliveryExpert help +46 370 33 97 704,8 · Lipscore
The store at Isaberg
Country
1 / 5
K2·Ski boots·Alpine ski boots

K2 Cortex 110 BOA

Alpine ski boot with Low Volume fit and BOA® system, built for skiers who want to push the edge on and off piste.

622 €
1Size
622 €
  • Delivery in 2–5 business days
  • 30-day returns
Ski expert
Not sure about the size? Chat with a ski expert, or call +46 370 33 97 70.
BOA® system
Boa system
The BOA® system on the shell gives fast, precise fit adjustment.
LV fit
Boot width
Low Volume last wraps the foot tightly for maximum control and power.
Flex 110
Flex
Flex 110 delivers a stable feel for skiing hard all day long.

About K2 Cortex 110 BOA – Alpine ski boots

The K2 Cortex 110 BOA offers uncompromising performance in a ski boot. Are you looking for a boot that delivers precision and comfort without feeling like a pure race boot? Then the K2 Cortex 110 BOA® is the right choice.

Thanks to its Low Volume (LV) fit, it hugs the foot snugly. This means maximum control and power transmission, without unnecessary space or bulk. You get a boot that adapts to your foot – for an enhanced feel in every turn.

The BOA® Fit System on the shell allows you to quickly and precisely adjust the fit over the upper part of the foot. The result is an even distribution of pressure and a securely held foot. This, in turn, means you're ready to carve edges in both groomed slopes and looser terrain.

The Cortex 110 features a classic cuff construction and is equipped with an Elite Fit liner with full lacing. It provides both direct feel and high comfort, perfect for those who want to ski hard all day without feeling pressure or fatigue in their boots.

K2 Cortex 110 BOA, Specifications:

  • Flex: 110
  • Last: 96-98 True LV (Low Volume)
  • BOA® Fit System: On shell
  • Liner: Elite Fit with full lacing
  • Instep: Fast Fit instep – easy to put on/take off
  • Rear spoiler: Adjustable
  • Energy Bolt Spine for stability
  • Cuff adjustment: Double adjustment
  • Sole: GripWalk for better grip when walking
  • Men's

The K2 Cortex 110 BOA® is perfect for those who want a ski boot that balances performance and comfort. It's easy to adapt, responsive when skiing, and gives you that wonderful control – without feeling overly aggressive. An ideal boot for intermediate to advanced skiers who want to ski more, longer, and better.

Fit & last

The last is the boot’s width across the ball of the foot. 100 mm is a medium width and suits most people. If you have a wide foot or high arches, we can spot-heat the shell in the store where it presses. The boot should feel snug when you try it on: your toes touch the front when you stand straight and pull back when you bend your knees. The liner packs out 3–5 mm during the first week, so a boot that feels comfortable in the store will be too big after a week. Always measure mondopoint — boot size has nothing to do with your normal shoe size.

Boot fitting

Buy your ski boots from us and you get free boot fitting for 1 year from purchase. That means we heat-mould the liner and grind or punch the shell at no extra charge. If we need to add materials or products, such as a custom-moulded footbed, you only pay for those — not for the work. You’re welcome to drop into our store at Isaberg, Sweden for up to 1 year after your order is placed.

Shipping & returns

Delivery time: 2–5 business days to Germany, from our warehouse in Hestra, Sweden. If the boot doesn’t fit right, free boot fitting is included for 1 year from purchase. Call +46 370 33 97 70 if you’re unsure before you order.

K2 Cortex 110 BOA specifications

CategoryAlpine ski boots
Skier levelIntermediate–Advanced
Flex110
LastNarrow (96–98 mm)
CuffDual
LinerElite Fit with full lacing
SpoilerAdjustable
SoleGripWalk
Often bought with K2 Cortex
Accessories that improve the fit
Therm-ic UV Pod Dryer, Pjäxtork
Therm-ic UV Pod Dryer, Boot dryer
Therm-ic · Accessories
46 €
Boot Bib
No More Boots Boot Bib
No More Boots · Ski Boot Accessories
12 €
Therm-ic Dryer Pjäxtork
Therm-ic Dryer Ski Boot Dryer
Therm-ic · Accessories
59 €
Völkl Classic Boot Bag Black
Völkl Classic Boot Bag
Völkl · Bags
26 €
More ski boots in the same category
Similar ski boots to compare
Fischer my cruzar 70 xtr
Fischer My Cruzar XTR 70
Fischer · Ski boots
271 €
Atomic Hawx Prime 75 W
Atomic Hawx Prime 75 W
Atomic · Ski boots
265 €
Dalbello Il Moro JAKK IF 1
Dalbello Il Moro JAKK IF
Dalbello · Ski boots
253 €
Dalbello Cabrio MV 75 W IF 1
Dalbello Cabrio MV 75 W IF
Dalbello · Alpine ski boots
253 €
Choosing ski boots
Your ski boots affect your skiing more than any other piece of equipment — and they’re the hardest to choose online. Below we go through mondopoint, flex, last and what a boot fitting does.
Mondopoint — measure your foot, not your shoe size
Ski boots are sized in mondopoint, which is the length of your foot in centimetres. Stand with your heel against a wall, mark your longest toe and measure. That measurement is your size. Your EU shoe size is a poor starting point because it varies between manufacturers. A ski boot should feel snug when it’s new — the liner packs out 3–5 mm during the first week of skiing.
Flex and what the number means
Flex describes how much force it takes to bend the boot forward. 60–90 is soft and forgiving, 90–110 is an all-round level, 110–130 is stiff for skiers who ski hard, and above 130 is race level. The number isn’t standardised between manufacturers, so a 100 from one brand can feel like a 110 from another. If you’re heavy or ski aggressively, you want a stiffer boot; if you’re lighter or a beginner, you want a softer one.
Last — the width of your foot
The last is the boot’s width across the ball of the foot. Narrow is around 98 mm, medium around 100 mm and wide around 102 mm. A medium last suits most people. If you have a wide foot, a last that’s too narrow isn’t something you get used to — but the shell can be heat-moulded to make room where it’s needed.
Boot fitting makes the difference
Nine out of ten skiers have something adjusted at their first fitting. We analyse your foot, heat-mould the liner and grind or punch the shell where it pinches. A custom-moulded footbed gives better heel hold and less foot fatigue, and is the single biggest improvement you can make without changing boots. Buy your ski boots from us and free boot fitting is included (materials such as footbeds are paid separately), and you’re welcome to drop into the store for up to 1 year after your order is placed.
Socks and fit go together
A thin, knee-high ski sock with no seams across the ball of the foot is the right choice. Thick socks make the boot tighter without making it warmer — it’s the air inside the boot that insulates, and a boot that pinches gives you cold toes. Never wear two pairs.
Frequently asked questions
Ski boots are measured in mondopoint, which is the length of your foot in centimetres. Put your heel against a wall, measure to your longest toe and choose that size. The boot should feel snug when it’s new.
Ski expert
Didn’t find your answer? Call +46 370 33 97 70 or chat with a ski expert.
K2 Cortex 110 BOA
Select size
622 €