Sometimes, when two things are combined, they produce something far greater than the original constituents. History is marked by such fusions: fire and meat, iron and carbon into steel, ski poles and ice axes, J-Lo and Shakira. Now, two of the best options for backcountry boots have joined forces to form the all-new, all-powerful F1 LT. By combining lightweight race features from the immensely popular Alien RS with the time-tested durable and reliable F1, SCARPA has created a boot that will change the game for years to come. While some boots may walk the line between race boot and touring boot, the F1 LT is the line. Built for long and fast tours as well as deep, technical descents, this is the boot for skiers who want to chase the most ambitious of objectives while spitting at the notion that skiability and weight are trade-offs.
The lower of the F1 LT was inspired by the Alien RS: made with a Carbon Grilamid LFT shell that is built with the same 3D Lambda Torsion Frame used by the RS to provide more direct power from your foot to the ski, the lower is secured by a simple Boa dial that cinches the waterproof gaiter across the top of your foot providing a quick, dry, and secure fit. Strategic cutouts on the exterior eliminate excess weight and material wherever possible while maintaining enough structural rigidity to drive high-fat skis with ease and confidence. The cuff (also made of the same Carbon Grilamid LFT) trades out the cord-closure of the RS for an F1 buckle strap to increase power and reliability and an additional removable powerstrap (+30g) for even more control on the descent. The spring-loaded ski-walk mechanism is easy to flip and provides an incredible amount of low-friction articulation that will make sure these boots are the last thing to hold you back when speeding uphill. The F1 LT is the boot that will make freeride skiers want to race and make racers want to freeride. Plus, a sexy orange-black paint job will give your ski partners something to look at as you fly past them in your new SCARPA F1 LT's.
- The prodigal child of two of SCARPA's most popular boots, the F1 LT sets the bar for other hybrid race/touring boots.
- Ankles rejoice! 72° degrees of motion is a 10° improvement over the F1 and is more akin to that of race boots.
- Carbon Grilamid LFT construction ensures the highest possible power-to-weight ratio.
- 3D Lambda Torsion Frame increases direct power transmission from foot to ski.
- Boa-secured waterproof gaiter will keep your feet cozy and dry.
- Dynafit Quick Insert tech fittings make stepping in a breeze.
- A surprisingly powerful race boot, or an impressively light touring daily driver, this boot can and will do it all.
- Forward lean can be adjusted by moving the ski/walk lever mounting position, with choices of 9°, 11°, or 13°.
- Removable rigid spoiler on the back of the liner is attached with Velcro so you can further tweak the forward lean (+/- 2°).
- Included power strap (+30 grams) pops on and off in a snap.
|Weight (pair)||1990g 
|Buckles||Velcro strap + BOA|
|Boot Sole Length||270mm 
|Binding Compatibility||Tech only|
|Forward Lean(s)||9°, 11°, 13° (+/- 2°)|
|Materials||Carbon Grilamid LFT|
|Liner||Intuition Cross Fit Tour LT|
|Sole||Vibram UFO RS|
|Skimo Co Says|
|Usage||Light and fast touring with confident downhill performance.|
|Notes||Removable Velcro spoiler on the liner tweaks the Forward lean.|
|Bottom Line||A light-as-possible touring boot that boasts the skiability of heavier boots.|
|Compare to other Touring Boots|
Questions & Reviews
I use them with skis ranging from 78 to 116 underfoot and have thoroughly enjoyed them with everything.
I had some concern about the gaiter stretching / wearing out with repeated liner removal/insertion so I bought a cheap in-boot dryer which has worked out fine.
The Liner of the Scarpa F1 LT is heat moldable. However, we generally recommend against shell work, as the shell is constructed out of carbon-infused Grilamid plastic, and any punching will void the warranty. If you have any further questions on boots, I recommend that you fill out a Boot Fitter, and we would be happy to guide you towards a boot that will work well for you!
That’s right the F1 light skis better than the F1.
Mostly due to its significantly taller cuff and more performance fit overall
The only critique I have is I could do without the Velcro, in place of a conventional buckle. I will say that the Velcro strap buckle system is much better with the adjustment numbers so that you know where to set it and forget it for the day (and incremental update from the strap on the older F1s. I have an incredibly narrow low-volume foot and by adding some standard boot fitting shims and pad material to take up space, they actually fit and perform perfect. I have a recently badly damaged right foot and my F1 light with an older broken liner is the most comfortable and best piece of footwear I own. Sounds like they fit mid range to wider feet as well which sounds impossible it seems to be working.
It’s worth noting that in eight years of skiing all iterations of the alien as well as the RS and the F1, I’ve only broken a Boa once. And it wasn’t a big deal to ski or replace.
If the game is about building the boot with the best tour-ability, combined with the highest downhill performance for the least amount of weight, this boot wins the whole game hands-down.
I am curious how these boots would be driving a ski like the Hyper V8? Or would that ski be too fat for these guys. Or would the regular F1 be a better fit.
The transition from up to down is a bit more clunky than the Alien RS, especially with the extra power strap (removable) but if you're not racing it's not really a big deal. The BOA is great but has limited range so some folks may run out of clicks before they are tight enough.
The down is what really impressed me. I like a bit more forward lean than the stock 11-degrees so I adjusted it to the 13-degrees setting and it felt much more responsive. The flex is more progressive than the Alien RS and the Fischer Travers CC (used last year). They are definitely the best skiing lightweight AT boots I've ever used.
8 1/2UK Salomon S/lab Classic Boots
43 1/3 Sidi Dominator Cycling Shoes
9 1/2 Hoka Trail Shoes
I have a high instep, subsequently because of the boot design a tad difficult to put on. However, the fit is incredible. They are the best skiing boots I’ve ever had
How does this boot compare to F1 stiffness-wise? Which one is better for wider skis?
also, how much wider is the comparable dynafit boot (and which boot would that be?)
See Brandon's comments in his 10/30/20 review and Jeff's comments in his 7/10/20 response. Apparently, they fit differently because Scarpa lowered the height of the footboard in the F1 LT.
Could you please clarify this? I think a lot of us that found the Alien RS a bit too narrow are interested in this issue. Thanks!
That added Zeppa ramp angle increases the pressure on the instep/Boa, lessens the pressure on the forefoot, and allows the metatarsals/toes to spread out in the boot without cramming against the front. (Granted, measuring the Zeppa-induced ramp in degrees rather than millimeters is a little confusing, since it would lessen with the bigger sizes and increase with the smaller sizes, so other folks may have a totally different fit impression of the Zeppa, or may not notice it at all.) Right out of the box, the 30.0 LT feels like a 31.0 RS, which is more of a "comfort fit" for me; I can fit a blue Superfeet insole in the 30.0 LT, which I never could have done in the 30.0 RS without crushing my big toe and 5th metatarsal head. To return to the orignial point, whether or not the fore-foot has been lowered in the shell to make for a wider fit is probably a less important question than if there are other construction differences that make the F1 LT fit differently than the Alien RS, even with the same scaffo.
In use, between the Zeppa-based heel raise and the added spoiler, the LT feel much more aggressive in its forward lean (even in the 9-degree position), much more like a TLT7/8 than an Alien-family boot. Minimal vert skied on the LT so far (and in abysmal snow), but it may be the perfect boot for skis (eg. Ski Trab Mistico) that demand more forward pressure and a more knee-bent stance, and for which the Alien RS's more upright stance was never ideal. Nessun scarponi é lontano: the perfect boot is never far away! :-)
Great question! Performance wise, they both punch above their weight class. However regarding fit, the two couldn't be further apart. The Scarpa is fairly narrow while the Dynafit is wide! Ultimately what will fit the best will perform the best for you.
In a size 31 the F1 LT comes in at a BSL 327mm and the F1 comes in at a BSL of 330mm.
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