Skimo Co

SCARPA Maestrale RS 4.0 Boot

$948.95 $711.71

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For a fresh hot take on the venerable Maestrale RS, the 4.0 model is redesigned with a more planet-friendly twist and different fit than its predecessor. Consistent with its environmental objectives, SCARPA is increasingly using materials made from renewable resources throughout its product lines. In this case, the cuff and shell are constructed with materials derived from castor oil, resulting in a boot that’s more sustainable to manufacture. Rest assured, these materials don’t cut corners and have allowed SCARPA to produce a Maestrale RS with the performance and durability of its predecessors whilst keeping its weight down. A confidence-inspiring set of 3 buckles combine to hold your foot in place and a dynamic power strap from Booster tops it off for a powerful and progressive skiing platform. Of course, it wouldn’t be a Maestrale without the generous range of motion and convenient ski/walk mechanism that the Maestrale is known for. With the RS 4.0, SCARPA is continuing its tradition of impeccably made ski boots that perform like the high-end Italian product they are.

  • Carbon-infused Grilamid BIO and Pebax Rnew construction are more environmentally friendly without sacrificing performance.
  • Speed MLT ski/walk mechanism is easy to use and allows for excellent power transfer.
  • Wave Closure system securely wraps the foot for increased performance.
  • HRS ankle strap keeps the heel locked down and not moving.
  • The power strap has all the features you’ll ever need: it’s a dynamic elasticized cam-lock beauty made by Booster.
  • Intuition Pro Flex liner is moldable and supportive.
  • Made in Italy

convert to ounces
1441g [27]
1533g [27.5]
Weight (pair) 2882g [27]
3066g [27.5]
Buckles   3 + Power Strap
Boot Sole Length   290mm [24.5/25.0]
299mm [25.5/26.0]
308mm [26.5/27.0]
316mm [27.5/28.0]
324mm [28.5/29.0]
333mm [29.5/30.0]
341mm [30.5/31.0]
350mm [31.5/32.0]
Binding Compatibility   Tech, Hybrid, ISO 9523
Cuff Rotation   61°
Forward Lean(s)   14°, 16°, 18°
Specs Verified Yes
Materials   Grilamid BIO w/ Carbon Core shell, Pebax R-New w/ Carbon Core cuff, Pebax tongue
Liner   Intuition Pro Flex Performance
Sole   Vibran Cayman LT (ISO 9523)
Skimo Co Says
Usage Free touring and everyday backcountry use
Notes Most powerful Maestrale yet with eco-friendly construction throughout the entire boot
Bottom Line Do-it-all boot for anything and everything backcountry
Compare to other Freeride Boots

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Questions & Reviews

Question from Kam
Hi, just got a pair of size 31 F1 GT that fit me better than any other boot. Maybe I'm still in the honeymoon phase, but I'm wondering if other scarpa models would work for me as my freeride boot. For me, the 31 was a size-up because I heard the F1 GT/LT/XT all run a bit short. Typically I've fit into size 29 in Fischer and Dynafit touring boots, although my feet have changed slightly over the years. I know the answer to fit questions is to try them on and shell fit, BUT do you think the 29.5/30 new Maestrale would fit similar to the 31 F1 GT?

Answer from Jeff
Kam, Different Scarpa boots have different fits. The F1 LT/GT/XT , have Scarpa sizing, which is different, but don't really run short. They are narrow and pointy toed. So you went a size big, so guessing your foot is a bit wide for the correct size. The Maestrale boots are wider, so in the size 29.5/30 could be just right for you.
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Question from Brett
Does this boot share all the infuriating aspects of the Quattro? Walk mode that shears in half, clicky annoying tongues, soft plastic that warps, etc?
Answer from Carlos M
Hi Brett,

There are some similarities between the 4.0 Maestrale and the Quattro, namely the fit, but also the tongue - it is the same style tongue that needs to be tucked in under the cuff. I do think it is a little easier on the Maestrale than the Quattro, because the front of the cuff is smaller and easier to work with. The two boots use different plastics as well.

We have not seen any broken walk levers/shells in the Maestrale RS 4.0! It seems to be a pretty sturdy boot.
Answer from Anthony O

the walk mode its different, not the same lever. It also is a lot less faffy to get into. the receiving pin area that was breaking on people has been beefed up, its 24mm of material width now as opposed to 19. the flex is subtly softer but not much. scarpa has responded to most of your concerns with next years quattro pro. More cuff material that covers the tongue more, beefed up receiving pin area, beefier liner 130+ flex. Id imagine the annoyingness to get on is the same though. I havent experienced warping plastic so unsure on that regard.
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Question from Ash
Does this version of the Maestrale have a full length boot board?
Answer from Niko M
Hi Ash! The boot board runs the full length. Thanks!
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Anthony O (used product a few times)
What a time to be alive. So many great boots! Firstly, the asterisk that states this boot maintains a similar shape to the previous maestrale is just wrong. Ignore that. This boot is molded off the Quattro, and is way lower volume than previous maestrale. It walks great like the Quattro, has one more upright setting of lean, and the bsl's are just bumped up one size from the Quattro. The liner is beefier than Quattro and the buckles are way less annoying. The flex is progressive and stuff. The Quattro is very stiff and scarpa says is 130 flex. The RS is stated to be 125. I think that the flex difference is indistinguishable and any variation can boil down to how it's buckled. The video linked in comments below is mine for people curious about other differences between maestrale and Quattro. This boot is powerful and walks great. I find scarpas support/flex to be more than comparables, ie, I find this boot more supportive than the zero g tour pro, and vastly stronger than the atomic xtd 120. Overall if it fits you it's definitely top of its class.

As always try boots on, the best featured boot that doesn't fit well is useless.
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Question from Fisher
How does the fit compare more directly to the RS 3.0? I've seen a number of reviews on fit comparing to the Quattro, and of course have noticed that the last is +1mm wider, but any adjustments to the shape?

I've found one comment about improved heel hold, which is encouraging as that is my primary issue with the fit of the 3.0 and 2.0
Answer from Carlos M
Hi Fisher,

The fit of this boot is very similar to the Quattro, but larger, for the same mondo size. We believe they are molded from the same last. Compared to the older Maestrale 3.0, this means less volume on top of the foot, and a narrower mid-foot and heel area. The forefoot may be a bit roomier laterally, but is certainly lower volume vertically. But for the same mondo size the new Maestrale may also feel slightly bigger. If your primary issue is heel hold, it might be worth trying the new boot as it has been reworked substantially!
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Question from Daniel
Hi! BSL +2mm compared to the 3.0 version. Is it an longer internall?

With 27cm feet (more like 26.8 with footbed aupport I should belong in 26.5/27 shells, right? Thanks!
Answer from Jeff
Daniel, The BSL is the length of the outside of the boot. It doesn't have any bearing on the internal size of the boot.
So if you were a 26.5/27 in another Scarpa boot, yes, I would go with it again.
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Question from Hayden
I see that the BSL numbers on these seem to correspond to the Quattro, but shifted one shell size down. Does this mean if I fit well in a 27.0 Quattro, that I could potentially fit into a 26.0 Maestrale RS?

Obviously this always depends on the individual's foot size and shape, but I'd like to know if they have a similar internal length.
Answer from Niko M
Hi Hayden! BSL refers to the measurable length of the outer sole and not the actual fit of the boot. In this case specifically, there is more material used in the lower of the Quattro when compared to the Maestrales resulting in the higher BSL value. Mondo size is the measurement that pertains to fit. In regards to length only, if you found a good fit in a 27 in a SCARPA boot, you'd likely find a good fit in a 27 in other SCARPA boots. The overall fits do differ between the Quattro and Maestrales. If you have any further questions, send us an email at and we'd be happy to dive in!
Answer from Hayden
Hi Niko, I think you may have misunderstood my original question. According to the skimo website (and the boots I own at home) the 27.0 Quattro has a 299 BSL. The 27.0 Maestrale is listed here as 306. So the Maestrale is actually the longer one. That said, the 26.0 Maestrale also has a 299 BSL, like the 27.0 Quattro. I heard a rumor that Scarpa is using the same last as the Quattro in the Maestrale, just sized up for a more comfort fit.
Answer from Kyle J
I concur with Hayden.

When doing a shell fit, I find that the gap behind my heel more closely corresponds with BSL and not mondo. Thus, in the case of these two boots, the BSL is a better indicator of internal length than Mondo.
Answer from Niko M
Hayden and Kyle,

You are correct with the bsl difference between the Maestrale and Quattro. I apologize, my mistake. In general however, BSL is a not an indicator of fit. Take this boot in a size 24.5/25 for example. Folks who feet measure 29cm or 290mm (the BSL of a 24.5/25) in length would find this size ~4cm too short. I apologize for any confusion with my mixup! Thanks.
Answer from Will P
Images below of a 26 4Quattro and the 25 Maestrale RS 4.0 (both with BSL of 290mm). The 4 Quattro is the best-fitting boot I've had (custom footbed, no heat mold required - 50+ days touring on them and no issues with the liners packing out) so naturally I went down the same rabbit hole with the new Maestrale boot. I shell fit the 26 and the 25 in the Maestrale and found the 25 fits almost identically as my 26 4Quattro. The liner on the Maestrale is more substantial (thicker and warmer) than the 4Quattro but after two tours in the new boots, It's been pretty tight, but I'm going to hold off heat molding these as well.

I found this video online to be helpful before I pulled the trigger:

There is quite a bit of redundancy in having both boots, but for me the 4Quattro is a great option for the resort (with kids) and for traveling with one pair of boots, while the Maestrale will be purely for touring/ski mountaineering.

Hope this is helpful.
Answer from Niko M
Hello Everyone.
Some good discussion here. Certainly some learning for me too with these new boots. After some deeper investigation, it appears the lowers of both the new Maestrale and Quattro are molded off the same plug. That is where the similarity of these boots end however. They have different liners, plastic, buckles, etc. This is also somewhat of an an anomaly when it comes to sizing based off mondo. In regards to length alone, if you find a good fit in a 27 SCARPA boot, you may find a good fit in a 26 in the Maestrales. Again I apologize for any confusion and thanks for sparking some research!
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Question from Tomas D
It looks like the RS 4.0 does not have leash attachments? Thanks!
Answer from Carlos M
Hi Tomas,

You are correct, no dedicated leash attachments. You could clip a leash to a buckle or install something, or use a wrap-around leash that clips to itself. But no specific attachment for leashes from the factory.
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Question from Chris L
Do you happen to know the BSL for size 29?
Answer from Gabriel I
Hi Chris, the size 29 has a BSL of 324mm. We've just measured our new stock and updated the specs for all sizes.
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Question from Justin
How does this compare to the Zero G in overall stiffness/power? I noticed the cuff height is about a full inch lower than the Zero G on both sides and the back, wondering how much of an impact that has.
Answer from Niko M
Hi Justin! Thanks for writing in. You're right, the cuff heights do differ. In this case and in terms of how much of an impact that has, it'll depend. Depends on one's own body anatomy, skiing technique, and overall preference. In a broad generalization, a taller cuff height does often lend to more support to a certain degree. With these two boots at hand however, it would likely be difficult to tell a notable difference. Now for stiffness/power, the Zero G is going to more closely resemble a traditional alpine boot giving it the edge in downhill performance. Evaluating stiffness alone, they are quite similar. The Zero G does have a touch more progressive nature to its flex pattern. Regardless both boots are exceptional downhill performers. It is important to note that these boots have different fits. If you're curious which one may be a better fit for you, fill out our
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Model: Maestrale RS

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