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Model: Alien RS
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Availability: In Stock
Price: $869.95
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Every so often a company will debut a category-shattering display of engineering that seems to break all kinds of rules, defy stereotypes, and spearhead a new generation of skiing. Behold: The Alien RS. Holding true to the da Vinci mantra "simplicity is the ultimate sophistication," the Alien RS is a delightfully simple boot. A stiff carbon infused grilamid cuff is mated to a stiff carbon infused grilamid lower by way of an unbelievably dexterous pivot that again, defies stereotypes. A Boa closure on the lower shell wraps around your foot to create a secure and precise fit. Racers, say hello to your new everyday boot light enough to sneak in 40,000ft of dawn patrols per week; freeriders, mountaineers, and steep skiers, say hello to your beefy race boot capable of taking you further than ever before.

  • Carbon Grilamid LFT Shell and Cuff blend industry-leading power-to-weight ratio with industry-leading price.
  • Lower Shell is built around a 3D Lambda Torsion Frame to increase lateral stability and power transfer.
  • Speed Cam Lock ski/walk mechanism is reliable, durable, and precise.
  • A waterproof, zippered gaiter tempts snow to even try to get into this boot.
  • Offset toe lugs promote a more natural walking motion to increase touring efficiency.
-> ounces
920g [27.0]
Weight (pair) 1840g [27.0]
Buckles 1 + BOA, Single Throw Speed Cam Lock
Boot Sole Length 270mm [24]
278mm [25]
286mm [26]
294mm [27]
302mm [28]
310mm [29]
318mm [30]
Binding Compatibility Tech Only
Cuff Rotation 72°
Forward Lean(s) 7°, 9°, 11°, 13°
Specs Verified Yes
Materials Carbon Grilamid LFT
Liner Intuition Cross Fit Tour
Sole Vibram UFO RS
Skimo Co Says
Usage Speed touring, high performance ski mountaineering, exceeding expectations
Notes Grilamid infused with long strands of carbon fiber increase torsional stability and precision. A zippered, waterproof gaiter invites you to use your imagination when accessing lines.
Bottom Line If the Holy Grail was a ski boot.
Question from Troy
Does this boot actually have a zippered gaiter? I tried on a pair a couple of days ago and I didn't notice a zipper but now I am seeing a zipper in your photo and a zipper is mentioned on the Scarpa website (as well as your website). Thanks.
Answer from jbo
Hi Troy, the prototype model had a zipper but it was removed for production. Sorry we don't have an updated photo yet, but that is about all that changed.
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Question from anthony
hey, I've had about 15 days in the alien rs in a sz 28. I love them, but I got quite a bit of slop in the fit which I am fairly comfortable skiing with, however I would like to get a different liner to suck up some of the void space. I find the fit around the toes to be narrow and tight (I have a felted superfeet wool insole inside right now) but I have a large amount of heel lift and movement around the calf. I have a 2 finger shell fit at the end of the day of skiing. In conjunction with perhaps some insole shims what liner and thickness would you recommend? Without knowing much it appears like either the powertrack 10 or ultralight performance liners in 7mm may be best? As stated my biggest issues are with heel lift and space around the shin. What are your thoughts (I know its not ideal to give fit recommendations online but im quite a few states away from you guys and have bad experience with some local fitters)? As always, thanks, you guys rule!
Answer from Nate
Hi Anthony, it's a bummer to hear that you are struggling with the fit of your boots. I've fit the Powertrack 10 on a number of customers, and tried it on for my own fit. I think it will be too tight of a fit in the toes for your Alien RS. The 7mm Ultralight Performance liner will likely be too thin.

I have experimented a little bit with the Intuition Pro Tour MV liner in the Alien RS and have found that it could be a workable solution if a person is dealing with too much volume in the calf and heel. You might try that in a size 28. The other option that may work is the Palau Tour Lite Performance liner in a 28, it's a touch thinner than the Intution Pro Tour.

If you haven't already, I'd also suggest making sure you are pulling the string nice and snug before flipping the lever in to ski mode. I've noticed that getting the string tension tight helps to clamp down the lower over the instep just enough to eliminate some heel slop.
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Question from Kamil
Hey. I had a Dynafit TLT7 performance boots, but "I" destroyed them ;D I am now considering scarpa RS. The stifness is a priority, not the weight. Speed turing, all day turing, races time to time. Anyway a lot of guys told me to get new scarpas. My question is what is the sole width of these two? tlt7 performance and scarpa rs? Looking forward to hearing from you! :)
Answer from Trace Leches
Hey Kamil! Oh no, that doesn't sound good. The Alien RS sure is a stiff boot. I'd say it's about on-par with the TLT7, but the TLT7 is a bit more progressive whereas the Alien RS kind of hits a wall with the forward flex. The last width of the Alien RS is a pretty narrow 99mm and Dynafit doesn't publish any of the last info but the TLT7 is high, wide, and on the opposite end of the fit spectrum as the Alien RS. Visit our Boot Fitter Program if you'd like to proceed with a fitting.
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Question from JJMS
Quick question on sizing. I'm a pretty comfortable size 27 (a bit on the small side) in a scarpa alien 1.0 (regular non carbon). I'm hearing that the Alien RS fits a little more snug and was wondering if I should be sizing up to a 28 on the Alien RS. I know it's hard to say without seeing the shape of my foot....
Answer from jbo
Hi JJMS, in general you shouldn't have to size up (and you'd want to look at other boots before doing that). The RS liner is thicker but it also molds really well.
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Question from tryggve
hi skimo! can anyone compare skiperformance between these, fischer traverse(carbon or non carbon) and the tlt5 m? i have skied the tlt5 m(without tongue) for many long dark cold swedish and norwegan winters now,and tried the alien rs and fisher traverse on in a shop,but have a hard time leting go of the tlt5.my tlt5 is super old with almost no sole left and i was expecting to realy want the other boots when trying in the shop,but now im not so shure.is it realy realy such an upgrade regarding the downhill performace? i ski an old colorfull 180 vector,listening to norwegan black metal, have the same clothes for ten years so maby the tlt5 sould just stay me forever?
Answer from Trace Leches
Hey Tryggve, thanks for reaching out!

First of all, Norwegian Black Metal? How can I start listening to this? I like your style, I think new gear may cause a singularity to appear.

The Alien RS is a fantastic boot, but so is the Travers Carbon. I'd say if you're looking for a new boot in this sub-1000g range you'd be wise to start with the Alien RS based purely on fit, however Scarpa has announced that they officially only want to see the Alien RS skied on anything up to 85mm underfoot, so based on that guideline you'd likely have better success with the Travers Carbon. That being said 85mm underfoot is well within the Alien RS's limits and it's capable of driving a much, much larger ski than that. The Travers Carbon is an interesting boot that behaves fairly similarly to the Alien RS and with a bit of work you'd likely be able to get the width and volume to work for you.
Answer from tryggve
o, you just start by listening to early darkthrone, like the song snowfall or land of frost.but remember alsow listen to other music, its like skiing, only hard windpack or ice is hard for legs, at least i need to mix it up with some crust or rockskiing sometimes. so mix darkthrone with maby antony and the johnsons or aphex twin or patti smith.
i will go with alien rs when my tlt5 turn to microplastics. i think alien rs will be verry fine with skis wider than 85 mm, im light on my feet, in many ways!
thanks for your answer and happy skiing!
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Question from Fred
I fit comfortably into a 31.0 Maestrale. Any chance of fitting into a 30.0? How much shorter is it?
Answer from Trace Leches
Hey Fred! That's a super broad question to answer without knowing any finer details but the short answer is: Probably not very comfortably. The size down will be 1cm shorter internally (equates to about 1 finger thickness). If your Maestrale is a performance fit you'd have a very hard time getting the size down to work. If your Maestrale is big then there's a better chance of getting this to work.
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Question from Erik
Hello. Have these boots and used them for two tours now. Plenty stiff, would say they are very simlar to my TLT6 C One. Stiffer than Syborgs.
But - i have two questions:
1.The heel hold is not very good for my foot. Any ideas? Have a special foot bed, and a nice fitted liner. Was thinking of mounting a aftermarket heel buckle, but dont feel so good about doing modifications on a brand new boot...

2. They are a bit narrow in the mid foot area. Is this area possible to punch out easily? Have a bit of travel to get to my nearest boot fitter, so was hoping for some pointers here first..

Best regards.
Answer from Trace Leches
Hey Erik, thanks for reaching out. Glad the boots have done well for you!

1) Tough to pinpoint this issue exactly. Did these liners come from another boot? How many days do you have in the liners? L-Pads around the heel may be the only answer, but I'd only go there after a proper liner mold and then a footbed.

2) This is also a very subjective issue, especially with an aftermarket liner and footbed. If it's a thick footbed it'll lift your foot up higher into the shell and potentially make the boot a bit narrower than it actually should be.
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Question from Patrick Fink
Any thoughts on 28 vs 29 if I'm in a 28.5 F1 evo?
Answer from jbo
Hi Patrick, without knowing more I'd say a 29, which is the same internal length as your current boot.
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Question from abp
Where do you think Scarpa derived their 85mm waist cutoff recommendation? Is it because they're worried they'll start seeing failures from the torque of wider skis or do they just think it's not enough boot to push a wider ski around?
Answer from jbo
Hi abp, the new guidelines aren't specific to this boot, but rather something SCARPA is doing with all their boots to limit warranty liability. The Maestrale and F1 are now indicated to 95mm underfoot despite many skiers having already proved they are more capable than that. Maestrale RS is <=110 for what it's worth.
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Question from James Witte
Are the 28 and 29 the same shell and what is the bsl of each?
Answer from Trace Leches
Hey James, thanks for reaching out. All of this info can be found under the "Specs" tab of the product, but no, the 28 and 29 are not the same shell. The 28 is 302mm and the 29 is 310mm.
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