2018-2019 Salomon S/Lab X-Alp 2nd Look
Stated Flex: None Given
Available Sizes: 24.5-30.5 (half sizes only)
Stated Last (size 26.5): 98 mm
Stated Range of Motion: 75° fore / aft; 35° lateral
Stated Forward Lean: 14°
Size Tested: 26.5
Boot Sole Length: 285 mm
Blister’s Measured Weight:
- Shells, no Liners: 914 g each
- Liners, no footbeds: 190 & 194 g
- Total Weight per Boot: 1104 & 1108 g
Buckles: 2 micro-adjustable aluminum
Powerstrap: 30 mm cam-style
- Cuff: Grilamid w/ carbon reinforcements
- Shoe / Clog: Grilamid
Soles: Fixed, rockered, rubber Contagrip
Binding Compatibility: Pin-style “tech” bindings with a pin heel
Tech Fittings: Dynafit certified
Skis / Bindings Used:
- DPS Wailer A112, 184 cm / G3 Ion 12
- ON3P Steeple 108, 184 cm / Fritschi Vipec 12
Test Locations: Tornak Yurt, ID; Whitefish Mountain Resort Sidecountry, NW Montana Backcountry, & Glacier National Park, MT
Reviewer: 5’8”, 195 lbs
Days Tested: 17
[Editor’s Note: Our review was conducted on the 17/18 S/Lab X-Alp, which is unchanged for 18/19]
Last year Jonathan Ellsworth and Cy Whitling offered their initial thoughts on the S/Lab X-Alp, Salomon’s lightweight touring boot.
Then Paul Forward shared his on-snow performance notes, and included several comparisons to boots in the category.
And now it’s my turn. I’ve been touring in the S/Lab X-Alp, so now I’m adding my thoughts on the boot, and offering a few more comparisons to some popular boots in this category.
Measured Weights & Comparisons
For reference, here are a few of our measured weights (listed in grams per boot) for some of the notable competitors in this category:
988 & 991 Scarpa Alien RS, size 28.0
1064 & 1070 Fischer Travers Carbon, 27.5
1065 & 1069 Dynafit TLT 7 Performance, 28.5
1167 & 1170 Atomic Backland Carbon, 27.5
1232 & 1232 Salomon S-Lab X-Alp, 27.5
1288 & 1286 Arc’teryx Procline Carbon Support, 27.5
1407 & 1416 Salomon MTN Explore, 26.5
Paul goes into great depth about the X-Alp’s features in his review, so here I’ll just cover the features that stood out most to me.
The X-Alp’s liner is thicker and certainly warmer than boots like the Dynafit Speedfit, Dynafit TLT6, or Atomic Backland Carbon. The S/Lab X-Alp has the nicest power strap I’ve used on a light boot — it’s high on the cuff, and uses a proper Booster Strap-esque cam buckle.
I’d echo Paul’s observation that the X-Alp’s lower buckle should be reversed so that it doesn’t flip open while postholing.
The gaiter in the X-Alp does a good job of keeping snow from getting in, but it also makes it more difficult to take the liners in and out.
Touring Performance / Cuff Mobility
As our other reviewers have noted, the S/Lab X-Alp makes use of the same upper cuff as the Arc’teryx Procline Carbon Support Boot. Salomon and Arc’teryx claim that this cuff provides 12° of lateral flex and 23° of medial flex to make climbing and touring easier in the boot, as the side portions of the cuff are divorced from the back part of it while in walk mode.
When open in walk mode, I’ve found that all the touring boots I’ve used in this category offer some degree of lateral flex simply because the upper part of the boot is loose enough to wobble and allow movement. I haven’t personally noticed any more flexion or dexterity with the S/Lab X-Alp than the TLT6 or Backland Carbon, though Paul has said that he noticed a slight difference.
One downside of the X-Alp’s lateral flex system is that, while in walk mode, the X-Alp’s cuff expands quite wide, making it difficult to fit a slimmer pair of touring pants like the Arcteryx Procline FL or Mountain Equipment Tour over the boot.
That said, the S/Lab X-Alp has the nicest range of motion from any Salomon boot I’ve used, and certainly deserves to be placed among the TLT6 and Backland Carbon in the uphill comfort and efficiency department. The X-Alp’s walk mode provides zero friction, lots of flexion, and an excellent stride. I think skiers who like to walk a long ways in their ski boots will be very happy with the S/Lab X-Alp.
Overall Skiing Performance
Perhaps the most compelling aspect of the S/Lab X-Alp is that it’s a light touring boot that still skis pretty well. The cuff and power strap sit higher on the calf than any light touring boot I’ve used (although they’re similar to the Scarpa Alien RS), and that, combined with the carbon / Grilamid construction makes for a boot that I’ve found to be stiff enough to jump and drive larger skis in variable conditions that one finds in the backcountry.
Personally, I’ve never felt undergunned skiing on the S/Lab X-Alp. This includes skiing rainy mank, deep powder, crusty wind buff, and steep, icy, spicy terrain. The caveat here is that I’ve spent a lot of time skiing in similar boots in this category. So if you’re coming from stiffer, heavier boots, the S/Lab X-Alp will likely feel light and flimsy, despite the fact that it’s one of the stiffest boots in its class.
Paul goes into a bit more detail on downhill performance in his review, and I think he said it best when he stated: “All boots in this category will require some adjustment for aggressive skiers who are used to stiff, alpine boots. But when skied with a balanced stance and an awareness of snow conditions, the S/Lab X-Alp can be skied hard and fast.”
In his review, Paul includes some comparisons between the S/Lab X-Alp and the Arc’teryx Procline Carbon Support, Salomon X-Alp Explore, and Salomon MTN Lab. Here are four more comparisons that I can offer:
Salomon S/Lab X-Alp vs. Salomon MTN Explore
The MTN Explore, while marketed as a touring boot, doesn’t have the totally friction-free pivot, much lower weight, or greater range of motion of boots like the S/Lab X-Alp for long days of walking. That said, the MTN Explore skis significantly stiffer than the X-Alp (if I had to guess, I’d say roughly 30-40% stiffer), making it much better than the X-Alp as a crossover inbounds / touring boot.
Salomon S/Lab X-Alp vs. Dynafit TLT6 Performance
Perhap the largest functional difference between these boots is the removable tongue on the TLT6. With the tongue in, the TLT6 can’t utilize its full range of motion, yet skiing without the tongue means that the TLT6’s flex is far softer and concentrated on a narrow and low section of the shin in front. The S/Lab X-Alp doesn’t have a tongue you have to remove, yet tours nearly as well as the TLT6 without its tongue and skis as stiff as the TLT6 with its tongue in.
Salomon S/Lab X-Alp vs. Dynafit Speedfit
The Speedfit is essentially a TLT6 Mountain CR, but with a non-removable Pebax tongue, slightly different liner, and lacks the option of adding a stiffer tongue. The Speedfit flexes less progressively, and perhaps ~15% softer than the S/Lab X-Alp. The toebox is also roomier in the Speedfit than the S/Lab X-Alp, yet the instep height is certainly higher on the S/Lab X-Alp.
It’s also important to note that both the Speedfit and TLT6 use Dynafit’s Ultralock system, which means that the upper cuff buckle and ski / walk mode are both linked to the same buckle. While this simplifies transitions, it also makes it difficult to use these functions separately when doing something like front pointing your way up a face. No such problem on the S/Lab X-Alp.
Salomon S/Lab X-Alp vs. Atomic Backland Carbon
The Backland Carbon from Atomic has a far roomier fit than the S/Lab X-Alp, and because the Backland Carbon’s whole shell is heat moldable (they claim you can gain up to 6 mm of forefoot width), it makes it a better option for high-volume feet. However, because the Backland Carbon also has a removable tongue, it suffers the same frustrations and detriments of the TLT6. The Backland Carbon with its tongue in skis a little stiffer than the S/Lab X-Alp, but the Backland Carbon isn’t as progressive in its flex. It’s also worth noting that the S/Lab X-Alp (and both Dynafit boots I’ve tested) use nearly all rivets, making it way harder to field-service or modify compared to the Backland Carbon, which uses screws throughout.
As we always say, we strongly recommend going to a trusted boot fitter prior to purchasing any ski boot. Your feet are not my feet. But with that important caveat, here’s how the S/Lab X-Alp worked for me.
Before using the S/Lab X-Alp, I’d used Salomon boots for a long time, and continue to use the MTN Explore as an inbounds and short-tour boot. My higher volume, high arch, high-ish instep feet have tended to match well with Salomon’s ski boots (e.g. the Ghost 130 and Quest Max 130) and Salomon running shoes (e.g., Wings Pro 2 & XA Alpine), and given that I prefer a lighter, fleeter boot for long touring days and ski mountaineering, I was excited to see if my feet were a good fit with the S/Lab X-Alp.
We were told by Salomon to size up for the S/Lab X-Alp, and Jonathan and Paul both found that this worked best for them. So I followed suit, and switched up from my normal 26.5 to a 27.5.
In the 27.5, I had plenty of room in the toebox, and the forefoot width felt good. But my heel wasn’t firmly locked down because of the length of the boot relative to my foot–this resulted in blisters and a very loose feel where my heel would lift up when I leaned forward into my shins.
I was able to then try a pair of size 26.5’s for comparison, and found that the 26.5 definitely grabbed my heel far better than the 27.5. The fit was tight in the heel, snug around my toes, and skied well. But the toebox itself proved to be quite tight, both laterally (where a sixth toe punch solved the issue) and lengthwise, which left me with blacked toenails. I would do more work to punch it out, but the adhesive securing the fabric gusset over the instep liquified and moved a bit during my sixth toe punch, so I’ve been leery of trying to add more volume up front (we’ll be asking Salomon about this issue and will report back with their response). As a result, I’ve now moved back to skiing in the Dynafit Speedfit (review forthcoming), Dynafit Hoji, and Atomic Backland Carbon since they all have roomier toeboxes that work better for my particular feet.
Cy, Jonathan, and Paul all noted a “low instep” in this boot (by “instep” they are referring to the plastic under the lower buckle, since the X-Alp doesn’t have the usual lower plastic section like normal 2-piece boots). However, I didn’t experience any pain in this area.
My personal experience with the sizing of the X-Alp suggests that if you’ve been a happy with the fit of Salomon boots like the Ghost and Quest Max 130 in the past, the S/Lab X-Alp might not be similar to the fit you’re expecting. So I’d definitely recommend trying these on prior to purchasing — which is something we think you should be doing with every ski boot anyway.
Seventeen days over two pairs of boots doesn’t give me too much to go on in the durability department. But in that time, I did see some shredding of the power strap where it wore on the cuff during walking mode, though it didn’t affect performance at all. Otherwise, no issues.
The Salomon S/Lab X-Alp is the best big-day, light touring boot that Salomon has made. If you like lots of range of motion, no removable tongue to mess with, a tall cuff with a progressive flex, and a liner that’s warm for this class of boots, the S/Lab X-Alp is one of the best options available in the light touring boot market. However, the S/Lab X-Alp has a pretty unique fit, even if you’ve used Salomon ski boots in the past, so be sure the boot fits your foot prior to buying.