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Scarpa F1 LT Review

Balanced, all-around ski touring boots that lean in the light-and-fast direction
Editors' Choice Award
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Price:  $800 List | $798.95 at Backcountry
Compare prices at 3 resellers
Pros:  Light, free-pivot cuff, appropriate stiffness and flex
Cons:  Cold, finicky transitions
Manufacturer:   Scarpa
By Jediah Porter ⋅ Review Editor  ⋅  Nov 9, 2020
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67
OVERALL
SCORE


RANKED
#2 of 14
  • Uphill Performance - 20% 8
  • Weight - 20% 9
  • Downhill performance - 35% 5
  • Comfort and Fit - 10% 8
  • Warmth - 10% 5
  • Ease of Use - 5% 5

Our Verdict

The Scarpa F1 LT is one of the most highly regarded boots in our line up. In the late winter of 2020 two different testers took them straight to the top of the Grand Teton and skied off, with no prior experience in the boot. Now, both these testers had extensive experience with a predecessor to the F1 LT. Below you'll find abundant comparison to that now-discontinued (and still admired…) predecessor Scarpa Alien RS. The F1 isn't overall better than the Alien, but it has improved in some ways. For fast and light ski touring and ski mountaineering (and if it fits; the F1 LT is relatively "high volume") you can't do better right now than this top award winner.

Compare to Similar Products

Our Analysis and Test Results

The Scarpa F1 LT is an iterative improvement in this Italian company's journey to perfect the lightweight ski touring shoe. This is simultaneously an ultralight all-around ski touring boot and a beefed up skimo race boot. If we had to pin it with one label, we'd lean more in the all-around direction. We have some nitpicks with it, but overall we love it. This is a boot that you can and should use for day-to-day, high energy (up hill and down) backcountry skiing and ski mountaineering. It'll drive any ski you actually want to lug around in the mountains and it will hold up for multiple seasons of high volume action. Its fit is forgiving and wide ranging. With an Intuition brand liner included, and a reasonable price point, this is a fairly good value.

Performance Comparison



For a "fast and light" boot  the F1 LT requires more onerous transitions than most.
For a "fast and light" boot, the F1 LT requires more onerous transitions than most.

Uphill Performance


The Scarpa F1 LT goes up hill like a dream. The liner and shell work together to provide nearly frictionless action through more range of motion than your ankles are capable of. The liner is thin, with a softened "flex zone" behind your achilles tendon. We don't recommend it, but we can say that you can easily drive a sensitive stick shift automobile in these boots.


Rock climbing, ice climbing, extended dry-ground walking; none of these are a problem in the F1 LT. Fast, long-stride skinning is a breeze. The low heel lifts of lightweight bindings, even on steep skin tracks, are not an issue with such great ankle articulation. If you are coming from resort boots or beefy touring boots, you won't first believe just how much freedom of motion you get from these and how much it matters over a long day. None of our other award winners have such easy touring performance.
You pick the F1 LT for high volume  high tempo backcountry skiing. Or very efficient travel at normal scale and pace.
You pick the F1 LT for high volume, high tempo backcountry skiing. Or very efficient travel at normal scale and pace.

Weight


A pair of the Scarpa F1 LT weighs 4 pounds 7 ounces. That's 1023 grams per boot. Of that, 809 grams are shell and 214 grams are liner. 214 grams in a liner is pretty darn light. In many boots you can save weight and upgrade performance with an aftermarket Intuition brand liner. The F1 LT's liner is made by Intuition and is lighter than basically anything else available. No need to upgrade until the liner wears out.


Of the boots we tested, very few are in the weight league with the Scarpa F1 LT. The closest competitors, in terms of weight, do not ski downhill nearly as good as the F1. The F1 is darn impressive in terms of weight to performance ratio. We have tested recent boots that are 200 grams heavier and don't ski as well.

Downhill Performance


In assessing the downhill performance of touring boots, fit is paramount. Basically, fit is paramount, in every way. After fit, though, there are two main attributes that affect downhill performance. First, stiffness. In terms of stiffness you want maximum stiffness to the rear and laterally. Next, forward flex. You want your ski touring boots, in downhill mode, to flex forward with evenly increasing support. This is referred to as "progressive" flex.


The F1 LT is stiff enough, laterally and rearward, for intermediate to expert backcountry skiers to ski any gear in any terrain and conditions, with some technique and "energy" adaptations. If you are new to backcountry terrain and snow the F1 LT will have inadequate and uninspiring support. The forward flex profile of the F1 LT is better than you'd expect. For decades the lightest ski touring boots have always emphasized stiffness over progressive flex. Scarpa has done better than most through the years, but lightweight boots are always going to compromise on evenness and graduation of the forward flex profile. You get more than you'd expect from this F1; press your shins forward and you don't hit any hard stops nor does it fold away from you. The resistance doesn't "ramp up" like we expect from resort boots, but it is better than most lightweight boots.
Here we've paired the F1 LT with relatively large  stiff  and heavy touring skis. This combo worked real well for this super high volume day of tough snow conditions. Throw out your preconceived notions of ski/boot pairings.
Here we've paired the F1 LT with relatively large, stiff, and heavy touring skis. This combo worked real well for this super high volume day of tough snow conditions. Throw out your preconceived notions of ski/boot pairings.

These are not hard-charging, supportive downhill boots. They are "enough", but not more than that. They reward centered, attentive downhill skiing and some mileage in adjusting. If you are accustomed to lightweight touring boots you will have no problem adjusting to the F1 LT. These ski better than any other boots we've used in this weight range.

Comfort and Fit


The Scarpa F1 LT, as compared to a wide sampling of the touring boots on the market, is just over on the wide side of average last volume. The lower boot shell is exactly the same as the lower boot shell of the revered Scarpa Alien RS, but the "boot board" insert is rumored to be less voluminous. The F1 gives you more room than the Alien RS. This F1 seems to fit more like Scarpa's Maestrale boots than the Alien series.


Our average-footed testers really liked the "out of the box" fit of the F1 LT. Wide footed testers could make it work with no shell adaptations. Those with low volume feet were able to make things work with thicker insoles or a shim between liner and shell sole. A high performance fit for those with low volume feet is difficult in the Scarpa F1 LT.
This is the main cuff strap/buckle of the F1 LT. The velcro does most of the adjustment  while the buckle does the final tightening. You can't get truly efficient touring by just undoing the buckle; you need to loosen the strap also.
This is the main cuff strap/buckle of the F1 LT. The velcro does most of the adjustment, while the buckle does the final tightening. You can't get truly efficient touring by just undoing the buckle; you need to loosen the strap also.

Warmth


We liked the room in the shell for toes to get blood. We didn't like, as much, the thin materials in both liner and shell. Fit properly, you'll make these work while moving in any conditions. If you downsize, or make extended stops, or use them on overnight trips, your feet will get cold in the F1 LT.


Warmth is a function of fit and materials. Fit is paramount. The most insulating boots, sized down, will make your feet dangerously cold. The flimsiest boots, allowing your toes room to wiggle, will be warmer than you might expect. The F1 LT isn't the flimsiest boot available, but it is close. Thin liner plus thin shell make for relatively minimal insulation. Keep warm with high-tempo ascent, energetic descents, minimal stops, and booties/overboots for expeditions and camping.

Ease of Use


We really liked the efficiency of the now-discontinued Scarpa Alien RS. Scarpa replaced the Alien RS with the F1 LT. The lower shell is the same on both, and the overall weight is similar. The F1 LT skis at least a little better and fits a little wider. The biggest difference, though, is in ease and efficiency. To go from easy uphill mode to downhill mode with the Alien RS was accomplished with one rear-mounted lever. To execute the same transition with the F1 requires four steps. You tighten velcro power strap, tighten velcro main strap, snap the cuff lever and engage the rear-mounted ski/walk lever.


You can cut out a step and save weight with the F1 by ditching (sans tools… this could be done on and off in the field and mid expedition, if desired) the power strap. We liked skiing the F1 with no power strap.
On the left  the discontinued Scarpa Alien RS. On the right  its replacement (but not fully an upgrade) the F1 LT.
On the left, the discontinued Scarpa Alien RS. On the right, its replacement (but not fully an upgrade) the F1 LT.

You can save another step by leaving the velcro main strap at one tension level. However, this compromises touring efficiency. The cuff velcro strap is tightened by a short-throw cam lever. The difference between tight and loose is just a few inches. If tightened for downhill performance, flipping the lever open doesn't give you enough slack in the strap to take advantage of the great, free-ranging cuff mobility on the uphill. We found ourselves making the full, three-step transition for any climb longer than a few minutes; the efficiency gains are worth it. It sure seems, though, that Scarpa could make the F1 LT have the same all-in-one transition lever of the Alien RS. Why did they go this route on this boot?

Value



The Scarpa F1 LT is about average in price. The predecessor Alien RS was way above average in price. That Scarpa upgraded downhill performance while dramatically lowering the price is great! We wish that the F1 was more efficient in transitions, but that is a small price to pay for the great financial savings. Further increasing the value of the F1 is the high quality liner. Boots from other manufacturers are greatly enhanced with liner replacement, sometimes before any use. This strategy automatically adds hundreds of dollars to the initial purchase price. There is no reason we can think of to replace the Intuition-made liner of the Scarpa F1 LT.

Conclusion


The award winning Scarpa F1 LT isn't perfect, but nearly so. All touring boots strike a balance between uphill and downhill performance. Heck, all ski touring gear strikes this same balance, on some level. With the F1 LT, Scarpa recalibrates the matrix against which we measure all boots. This is an affordable, hot rod touring boot that skis downhill as well as any of you should need. Our other top award winning boot model strikes a similar "curve-breaking" performance balance, with the emphasis tilting toward the downhill legs of your days. These are exciting, optimistic times for backcountry ski boots.

Jediah Porter