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Guide
Ski Boots
Fit comes before stiffness: measure both feet and check heel and forefoot hold. Then choose flex and features for your ability and binding.
Key points
- Mondopoint is foot length in cm: 26.5 means 26.5 cm.
- Last width as a guide: up to 98 mm narrow, around 100 mm medium, 102 mm or more wide.
- Flex is not standardised: compare within a brand first.
- Check sole standard and binding approval; have new boots set up by a shop.
Buying advice
Which ski boot suits you?
Five questions on who the boot is for, terrain, ability, foot width and budget narrow the choice. A fitting and binding check are still needed.
- Compare by use
- Check fit and features
Which boot for which terrain?
| Use | What to expect | Your choice |
|---|---|---|
| First turns | What to expectForgiving flex and easy forward movement | Your choiceSoft piste boot |
| Fast piste skiing | What to expectDirect pressure on the ski edge | Your choiceFirm piste boot |
| Off-piste with climbs | What to expectWalking and skiing alternate | Your choiceFreeride boot with walk mode |
| Children and teenagers | What to expectCalf height and ability matter | Your choiceSuitable children's cuff |
Types compared
Downhill (piste)
For groomed pistes. Dalbello quotes a flex of 75 for the Veloce MAX 75.
- Advantage: Direct power transfer
- Drawback: Usually no walk mode
All-mountain
For piste and varied terrain. Atomic quotes a flex of 95 for the Hawx Prime 95 BOA W.
- Advantage: Often a GripWalk sole
- Drawback: Not the boot for long climbs on skins
Freeride & touring
For descents with climbs. K2 lists a walk mode for the Mindbender 120 BOA.
- Advantage: Walk mode frees the cuff
- Drawback: Touring sole won't fit every alpine binding
Racing
For fast piste days. Dalbello quotes a flex of 130 for the DRS 130.
- Advantage: Narrow lasts from about 92 mm
- Drawback: Tight and stiff: tiring over a full day
What to check before you buy
| Question | In short | Why |
|---|---|---|
| Which sole is fitted? | In shortRead the boot standard | WhyAlpine: ISO 5355. GripWalk: ISO 23223. A shop checks your binding's approval. |
| How does the flex feel? | In shortAllow for cold | WhyPlastic stiffens in frost. DSV aktiv warns that ski boots are often chosen too stiff. |
| Does the cuff suit your calf? | In shortClose without pressure | WhyBuckles should hold without crushing the instep. A different last helps more than extra length. |
Frequently asked questions
How tight should it feel?
Your heel stays down. Toes have room in a skiing stance; pressure points are not a necessary part of a secure fit.
Can it be fitted to my feet?
A shop can mould suitable liners. This cannot make an oversized boot smaller.
What about my old binding?
A shop checks compatibility and resets sole length and release value. Equal Mondopoint sizes do not guarantee equal sole lengths.
Women's or men's boots?
DSV aktiv points to differences in cuff height and calf shape. Choose the last and cuff that fit your own feet and legs.
Last updated: October 2026
What for?
Beginners
For your first ski days, choose a forgiving piste boot. Flex 60 to 90 is a guide; the width must suit your foot. A boot that is too large is no substitute for a comfortable fit. Have the fit and binding checked in a shop.
- flex is a guide
- width suits your foot
- do not size up
Fast piste
For fast carving, choose a downhill ski boot with a flex of 110 or more (90 or more for women) and a 98 to 100 mm last. Narrower and stiffer means more direct edge pressure.
- Flex 110 and up
- Last 98 to 100 mm
- Firm heel hold
Freeride
For freeride, choose a freetouring ski boot with a walk mode and a flex of around 100 to 120. If you climb on skins, the ski boot needs tech inserts, and sole and binding have to match.
- Walk mode
- Tech inserts
- Flex 100 to 120
- Sole matches binding
Kids
Children need a cuff that suits their calves and a flex they can move. The selection spans ski lessons and race training. Sole type and binding must match; try the liner separately.
- suitable cuff height
- flex suits ability
- sole matches binding
- try the liner
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