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Salomon·Ski boots·Hybrid ski boots

Salomon S/LAB Shift Alpha BOA

A high-performance hybrid boot with BOA fit for advanced skiers who want downhill power and efficient touring.

857 €
1Size
857 €
  • 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.
Flex 140
Flex
Stiff flex delivers powerful response for high-speed skiers.
BOA Fit
Fit
BOA Fit System and Exobelt lock the foot securely, no pressure points.
Narrow last
Fit
Narrow last gives a precise fit for narrower feet.

About Salomon S/LAB Shift Alpha BOA – Hybrid ski boots

The Salomon S LAB Shift Alpha BOA is a high-performance boot for those who want uncompromising downhill power but still full functionality when it's time to go up. It is developed for advanced skiers who push hard on and off-piste, but who also want to be able to move efficiently on their way up to the next run.

The Alpha fit with a 98 mm last provides a tight and precise feel, especially for those with narrower feet or who want maximum precision. The BOA Fit System combined with Exobelt locks the foot evenly and securely around the ankle. This provides stability without pressure points and makes it easy to fine-tune the fit throughout the day.

The Freespine construction creates a direct connection between the cuff and shell. The result is an extremely responsive boot with strong power transmission in every turn. At the same time, the walk mode provides good mobility for efficient climbing. Flex 140 gives a very stiff and powerful feel for skiers with high speed and clear technique.

The polyurethane shell with Powerplate provides stability and precision, while the Pebax cuff keeps weight down and improves mobility in walk mode. The Shift CF Lab Liner with lacing and Sensitive² Footbed provides good heel grip and stable comfort even on long days on the mountain. GripWalk soles provide secure grip and smooth walking off the binding.

The Salomon S LAB Shift Alpha BOA is the boot for those who want top-level downhill performance combined with true touring functionality, without compromising on fit or feel.

Salomon S/LAB Shift Alpha BOA, Specifications

  • Last 98 mm
  • Flex 140
  • Weight approx. 1850 g per boot
  • Plastic Polyurethane shell, Pebax cuff
  • Men's model
  • Walk mode Yes
  • GripWalk Yes
  • Liner Shift CF Lab Liner
  • Other info: BOA Fit System, Exobelt, Freespine construction, Powerstrap 50 mm, touring-focused performance

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.

Salomon S/LAB Shift Alpha BOA specifications

CategoryHybrid ski boots
Skier levelAdvanced–Expert
Flex140
LastNarrow (98 mm)
CuffPolyurethane/Pebax
LinerShift CF Lab Liner
Walk mode/GripWalkYes
WeightApprox. 1850 g/boot
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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.
Salomon S/LAB Shift Alpha BOA
Select size
857 €