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Salomon S/Pro Supra Dual Boa 120 Ski Boot Review

Henri Halle (gear tester)
Eli Bernstein bio photo
ByMultiple Authors
Aug 29, 2025
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Our Take:
4.1/5

The Salomon S/Pro Supra Dual Boa 120 ($840) aims to blend a modern, Boa-focused design with a flex geared towards advanced skiers. It doesn’t quite succeed at the second goal, but that actually makes this boot a decent choice for high-intermediates who want top-notch tech without the demanding stiffness of a performance boot. The Supra’s plush liner, relatively soft shell, and medium-volume last make it feel approachable out of the box. But if you like to drive a ski hard or rely on your boots for precise feedback, this one may feel underwhelming. The two-Boa system does add great adjustability—just don’t expect the same response you’d get from a hard-charging boot.

Hardpack Performance

Hardpack Performance

3.5/5
All-Mountain Performance

All-Mountain Performance

3.5/5
Comfort

Comfort

4.5/5
Fit Customization

Fit Customization

4/5
Build Quality & Durability

Build Quality & Durability

4.5/5
Sustainability

Sustainability

3.3/5

Flex

120 (105W, 115W, 130)

Last

100mm

Sizes

24 - 31.5

Weight

8 lb. 4 oz.

Pros

Liner is reasonably plush and plenty comfortable for a full day on the hill.
100-millimeter last strikes a good balance between space and performance.
Made with Salomon’s typically high quality.

Cons

Skis softer than its stated 120 flex (which might be a plus for some skiers).
Significant investment for a boot you may progress out of.
Dual Boa collection only available in a single width.

For this season's top models, see our guide to the Best Ski Boots.

Despite its 120 flex rating, the Salomon S/Pro Supra Dual Boa 120 (woof, that’s a mouthful) felt underbuilt for high-speed carving. It’s smooth and easygoing, sure, but not particularly confidence-inspiring when leaned into. I found the boot too soft to hold up to powerful turns or steep corduroy charges, especially compared to more assertive models like the K2 Cortex 130 Zonal Boa that I also tested. The Supra’s flex ramps up too quickly, and instead of offering progressive resistance, it just gives way. Aggressive skiers might want a ski boot that feels like a race car, but the Supra is more comparable to a Cadillac.


Having said that, the fairly laid-back feel isn’t the worst if you’re an intermediate skier who wants a well-made boot but might not be ready for a stiffer model that requires constant driving. The forgiving quality that makes it less than ideal for a skier like me could be attractive to someone who’s working to perfect their turns and likes the idea of a medium-volume model and fine-tuning fit with two Boa dials. (Granted, that person will be paying quite a lot for what could amount to a transitional boot.)

Regardless, the Supra’s edge control is decent for a boot that puts comfort and adjustability first. It transitions cleanly side-to-side and would likely feel intuitive for lighter or less aggressive skiers. I just couldn’t shake the sense that I was out-skiing the boot, and I felt that it didn’t generate power the way a top-tier, 120-flex, full-polyurethane alpine boot should. The Salomon S/Pro Supra Dual Boa 120 performs best when you're cruising, not pushing hard.

In ungroomed snow, the Supra’s Cadillac-like plushness proved more of a strength. I skied it in spring conditions—slush, chop, variable bumps—and appreciated how it muted harsh snow and made uneven terrain feel less punishing. There’s no jarring feedback throughout the boot, which makes it more appealing for long off-piste runs, especially if you’re still learning how to navigate less-than-ideal snow conditions.


However, this boot just didn’t spark joy no matter where I wore it. I didn’t have that feeling of being connected to the ski in the way I want when things get spicy. Yes, the Salomon S/Pro Supra Dual Boa 120 has decent travel and soaks up impact better than stiffer overlap ski boots. But it also just felt a little too mellow, and there’s a limit to what you can do when the boot folds up under pressure. If you stick to forgiving snow or just want a chill off-piste cruiser that won’t shake your teeth out, it’s totally serviceable. But if you’re looking to go fast through the steeps or ski aggressive lines, you’ll probably want something stiffer and snappier underfoot.

If comfort is your main priority, the Supra should be on your list—at least for the right foot shape. It has a middle-of-the-road 100-millimeter last, and the plush liner is easy on the instep, if not quite at the level of the super-cushy Lange Shadow 120 MV. The polyurethane shell also feels less rigid and molds more easily than what you'd find in high-end overlap designs, which (as I’ve mentioned a bunch of times above) isn’t great for stability and power transfer but makes for an accommodating feel. My extra-wide feet didn’t love the stock liner and shell combo, but when I wore just the liner, I found it plenty comfortable. (I ended up switching to an Intuition Pro Wrap liner when all was said and done, but folks with narrower feet might not have to.)


As I broke the boot in, I didn’t notice any change in the Supra’s performance, so the fit probably won’t degrade much over time. Entry and exit were comparable to the K2 Cortex, in that getting the boot on and off is a bit of a squeeze, but nothing catastrophic. (I’d still recommend popping the Boas open on your walk to the parking lot to make life easier at the car.) For many skiers, this will be a ski boot you can wear all day without discomfort.

The dual Boa dials are the unquestioned highlight of the Salomon S/Pro Supra Dual Boa 120. They offer fine-grained control over pressure at both the cuff and forefoot, and I had no issues dialing in tension when I wanted to adjust for different snow conditions and activity levels. The metal wires held securely and never popped loose mid-run. The Supra’s 45-millimeter-wide power strap is beefy, but I wish it had a metal lock instead of relying on Velcro. Still, for someone prioritizing adjustability and a precision fit, this boot has a lot to offer.


It’s not a miracle for all foot types, though. The Supra’s shell and liner are both heat-moldable, but my wide feet couldn’t handle them together. It’s nice to know that a bootfitter can try to alleviate the worst aches and pains by baking both of the Supra’s components, but I just wasn’t the target audience. The boot should adapt well if you’re committed to customization.

Build quality on the Supra is solid, which is par for the course for a Salomon boot. The Boa dials feel bomber, and the shell material is high quality, though softer and less robust than a true race-style boot like the Cortex. (Which could lead to some degradation over time, but I haven’t seen it yet.) Even though the shell is slightly more malleable than that of stiffer ski boots, it doesn’t feel flimsy. The liner and power strap both feel premium, and there’s no wonky construction. Nothing about this boot felt cheap or fragile during my testing, which might alleviate some of the pain of the Supra costing almost $900.


I also like that the Supra’s GripWalk soles are replaceable, which is great if you rack up a lot of days and wear them down. All in all, this is a well-made boot. It just isn’t built to be pushed the same way stiffer ski boots are.

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Recycled Materials

Recycled materials are prevalent in outdoor gear, with nylon, polyester, wool, and down among the most common, but the composition varies widely. A green check mark indicates the product is made with a substantial amount of recycled materials (100% recycled or the core fabric that makes up most of the product is recycled), a yellow check means it contains a moderate to small amount of recycled materials, while a red X means there are no recycled materials in the product.

The Supra’s 100-millimeter last should make it a good fit for average feet, but my feet are far from the norm. They’re quite wide, about 102 or 103 millimeters, and I had a hard time with the boot’s stock liner. My toe box is broad, I have a medium arch, and my second toe is longer than my big toe—classic wide, high-volume foot problems. The liner was simply too tight and caused pain around the midfoot area, as well as on my bunion.


That said, the Supra’s heel is well-proportioned—neither sloppy nor cramped. And once I swapped in an Intuition Pro Wrap liner and added aftermarket footbeds, the comfort improved significantly. However, this created a weird fit mismatch in the toe box, which felt oversized after the switch. That won’t be an issue for everyone, but it highlights how the Salomon S/Pro Supra Dual Boa 120 may require some finagling to fit truly high-volume feet. (It also only comes in a 100mm last, and not a low- or high-volume version like the Tecnica Mach1 series.) For medium-width feet, the stock setup may work just fine.

K2 Cortex 130 Zonal Boa ($950): High Precision for Hard Chargers
Compared to the Supra, the K2 Cortex 130 Zonal Boa is a dramatically more powerful boot. It also has two Boas, but whereas the Supra takes an easygoing approach, the Cortex is built for aggressive skiers who want precision, feedback, and a flex that ramps smoothly under load. The Cortex’s heel pocket is much more secure, and its shell is stiffer and more supportive throughout. Yes, the Cortex is harder to get into and its low-volume, 96/98-millimeter last requires an even more specific fit (especially for wide-footed skiers). However, it rewards that effort with top-tier on-snow feel. If you’re an intermediate who prioritizes comfort or doesn’t want to fight your boots all day, the Supra is appealing. But if you’re charging hard and skiing varied terrain with intensity, the Cortex is the clear step up. For more, read our review of the Cortex 130 Zonal Boa.


Lange Shadow 120 MV ($850): Go All-In On Comfort
Conversely, if you want even more comfort than the Supra offers, the Lange Shadow 120 MV may be the way to go. Its uber-plush liner makes it the cushiest-feeling boot we tested, and it also has a 100-millimeter last. This boot is also supremely easy to get in and out of, which is nothing to scoff at. However, the Shadow suffers the same mushy-feeling fate as the Supra. It didn’t ski as powerfully as we wanted it to, which disappointed our expert-level tester. Then again, that could make it more appealing to intermediates. The Shadow also has an advantage over the Supra in that it comes in a low-volume (97mm) last, if that fits your foot better. For more, check out our review of the women's Shadow 115 MV.

Salomon S/Pro Supra Dual Boa 120 ($840)
Adjusting Salomon S_Pro Supra Dual Boa 130 ski boot Boa dial
4.1/5

Not every boot needs to be a hard-charging beast. The S/Pro Supra Dual Boa 120 (women's 115) packs a ton of tech into a package that should appeal to skiers who want decent stability, but don’t want to get bucked. It’s not quite worthy of its high price tag, though.

Flex
120 (105W, 115W, 130)
Last
100mm
Sizes
24 - 31.5
Weight
8 lb. 4 oz.
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Hardpack Performance

3.5/5
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All-Mountain Performance

3.5/5
Icon

Comfort

4.5/5
Icon

Fit Customization

4/5
Icon

Build Quality & Durability

4.5/5
Icon

Sustainability

3.3/5
K2 Cortex 130 Zonal Boa ($950)
Adjusting K2 Cortex Zonal Boa 130 ski boot Boa dial
4.6/5

Speed demons and jump-turn enthusiasts, rejoice. The Cortex 130 Zonal Boa (women's 125) provides a powerful platform that will shepherd you confidently through arced turns and dizzying steeps. It’s expensive, though, and its narrow fit might not be for everybody. 

Flex
130 (95W, 105W, 110, 120, 125W, 140)
Last
96mm - 98mm (MultiFit Last)
Sizes
24.5 - 28.5
Weight
9 lb. 14.3 oz.
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Hardpack Performance

4.5/5
Icon

All-Mountain Performance

5/5
Icon

Comfort

3/5
Icon

Fit Customization

4.5/5
Icon

Build Quality & Durability

4/5
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Sustainability

0.7/5
Lange Shadow 120 MV ($800)
Buckling Lange Shadow 115 W MV ski boot
3.9/5

The Shadow has been a hot topic across the ski world recently. However, while we found it to be luxuriously comfortable and a well-rounded advanced-level boot, its stiffness and precision left us wanting more when it came time to charge. 

Flex
120 (85W, 95W, 110, 115W, 130, 140)
Last
100mm (97mm)
Sizes
24.5 - 31.5
Weight
8 lb. 11 oz.
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Hardpack Performance

3/5
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All-Mountain Performance

3.5/5
Icon

Comfort

5/5
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Fit Customization

3.5/5
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Build Quality & Durability

3.5/5
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Sustainability

3.7/5

Is the S/Pro Dual Boa 120 for You?

If you're an advanced-intermediate skier who doesn’t want a particularly stiff boot but who does enjoy a healthy dose of comfort, the Salomon S/Pro Supra Dual Boa 120 might be your speed. Speaking of: You probably won’t be setting any downhill records in this boot, but its smooth and fairly forgiving feel makes it a good stepping stone between intermediate ski boots and models made for advanced and expert skiers. Wide-footed skiers will almost certainly need to invest in liner swaps or bootfitting work, but for the right user, the Supra offers all-day comfort and simple Boa adjustability in a sleek, well-built package.

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