100-Flex Women’s Ski Mountaineering Boot
Scarpa F1 RS Women’s Alpine Touring Boot
The Scarpa F1 RS Women’s is a ski mountaineering boot for advanced backcountry skiers who want race-derived weight without a race fit. Scarpa’s Overlap Flow construction lets the shell open wide enough to step into easily, and the BOA H+1 closure wraps the forefoot in one motion rather than through a row of buckles. At 1,210 g per boot in a 25 with a 100 flex on a 101 mm last and 60 degrees of cuff rotation, it sits between a race boot and a touring boot and asks which of the two you actually need.
Expert Fit Review
Fit profile and recommendations reviewed by CCBB bootfitters.
Is This the Right Boot for You?
Best For
Advanced backcountry skiers with low to medium-volume feet who prioritise weight and transition speed on skis 80 to 100 mm underfoot.
Consider Another Boot If
You want frame or MNC binding compatibility, or maximum downhill power. The sole carries no published ISO norm and the flex is 100.
CCBB Boot Ratings
Uphill Efficiency
60 degrees of rotation at 1,210 g (size 25)
Downhill Performance
100 flex on a 101 mm last
Walking Comfort
60 degrees of cuff rotation
Transition Speed
Single-motion FS Lever with one buckle
Rating scale: 5 = top of its class, 4 = excellent, 3 = good, 2 = specialized or below average, and 1 = limited.
CCBB Fit Profile
Overall VolumeLow to medium
Toe BoxMedium
Forefoot VolumeLow
Instep HeightMedium
Heel HoldGood
Ankle HoldGood
PunchabilityModerate
Heat MoldableYes
Why We Like It
- Overlap Flow construction is the real story: the shell opens far enough that getting in and out stops being a fight, which matters more on cold transitions than any spec sheet suggests.
- The BOA H+1 system closes the forefoot in one geared motion with multidirectional micro-adjustment, and one buckle handles the cuff, so a full transition is two actions.
- At 1,210 g per boot in a 25 it undercuts most 100-flex touring boots while keeping a 101 mm last rather than dropping to a 99 mm race fit.
- A Booster power strap comes standard, which is unusual at this weight and adds noticeable damping to the flex.
Best Uses
- Fast ski mountaineering and long ascents
- Spring couloirs and technical terrain on skis 80 to 100 mm underfoot
- Skiers who transition often and value one-motion closure
- Pin-binding setups only
Bootfitter's Advice
The F1 RS Women’s runs a 101 mm last, which is a touring last rather than a race last, and it fits low through the forefoot with a medium instep. Scarpa lists the size run as 23 to 27 in half sizes in its technical manual while its website shows 22 to 27, so confirm availability at the small end before ordering.
Glass-fiber reinforced Grilamid takes punching moderately well, less readily than plain Grilamid and more than a carbon shell. Plan the fit around the Intuition FS Tour liner, which Scarpa specifies at 6 to 8 minutes. Forward lean is 15 degrees with 2 degrees of adjustment either way.
Fit profile reviewed by CCBB bootfitters. Final sizing should be confirmed with a shell fit whenever possible.
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Technical Specifications
Manufacturer specs · Click to expand
Fit and Construction
Weight: 1,210 g per boot (size 25)
Sizes: 23 to 27 (half sizes)
Last: 101 mm
Flex: 100
Range of Motion: 60 degrees
Shell: Grilamid Fiber Glass LFT, a glass-fiber reinforced nylon
Cuff: Pebax Rnew, a castor-oil-based plastic
Tongue: Pebax Rnew
Features and Compatibility
Walk Mode: FS Lever ski/walk mechanism
Closure: One buckle with a BOA Fit System and a Booster power strap
Binding Compatibility: Pin/tech (low-tech) bindings. Scarpa’s own binding-system line reads TLT and AT; until Scarpa confirms a sole norm we publish the narrower answer.
Sole: Vibram FS outsole with Durastep rubber. No ISO norm published.
Forward Lean: 15 degrees, plus or minus 2 degrees
Liner: Intuition FS Tour Women’s liner, a heat-moldable foam
Liner Mold Time: 6 to 8 minutes
Article Number: 12101/502
Notes: Overlap Flow construction with the BOA H+1 closure system
Compare the Scarpa F1 RS Women’s
F1 RS W vs. Scarpa F1 XT W
The Scarpa F1 XT W is the stiffer touring boot on a 100 mm last at 1,035 g per boot in a 25, and it also carries no ISO sole norm. The F1 RS Women’s trades a little weight for Overlap Flow entry and the BOA H+1 closure. Both are pin-binding boots.
Shop Scarpa F1 XT W boots
F1 RS W vs. Scarpa Gea RS
Different jobs. The Scarpa Gea RS is the freeride touring boot at a 125 flex and 1,405 g per boot in a 25, on an ISO 9523 sole that also runs frame and MNC bindings. The F1 RS Women’s is 195 g lighter and softer, and pin-only. Skiers who ski hard on wide skis take the Gea RS.
Shop Scarpa Gea RS boots
F1 RS W vs. Scarpa Alien
The Scarpa Alien is the race crossover at 870 g per boot on a 99 mm last with 72 degrees of rotation and a 95 flex. The F1 RS Women’s is 340 g heavier with a roomier last and a stiffer flex. Foot volume and how much descending you do decide it.
Shop Scarpa Alien boots
Common Questions
Who should buy the Scarpa F1 RS Women’s?
The Scarpa F1 RS Women’s suits advanced backcountry skiers who want low weight and fast transitions without a narrow race fit. At 1,210 g per boot in a 25 on a 101 mm last with a 100 flex and 60 degrees of cuff rotation, it is a ski mountaineering boot for skis 80 to 100 mm underfoot.
What bindings work with the Scarpa F1 RS Women’s?
Pin/tech (low-tech) bindings. See the question below on why we publish the narrower answer.
Scarpa lists this boot as AT compatible. Why do you say pin only?
Because the two statements in Scarpa’s own data do not agree. Scarpa’s technical manual lists the binding system as TLT and AT, but gives the outsole only as Vibram FS with no ISO designation. On boots that do carry the norm, such as the Gea RS, Scarpa prints it explicitly as Vibram Cayman LT (ISO 9523). Frame-binding release depends on sole geometry defined by that norm, so we publish pin/tech only until Scarpa confirms it. We have asked. If you need a frame binding, choose a boot with a stated ISO 9523 sole.
What is the range of motion on the Scarpa F1 RS Women’s?
60 degrees.
What foot shape fits the Scarpa F1 RS Women’s?
A low to medium-volume foot on a 101 mm last, which is a touring last rather than a 99 mm race last. It runs low through the forefoot with a medium instep. Skiers with a high instep or a wide forefoot should shell fit before committing.
What is Overlap Flow construction?
A shell design that lets the boot open much wider than a conventional cuff allows, so stepping in and out is easier, while keeping full cuff rotation for touring. In practice it is the feature you notice most on a cold transition, and it is the main thing separating this boot from the F1 XT.
How does the sizing run on the Scarpa F1 RS Women’s?
Scarpa’s technical manual lists 23 to 27 in half sizes; its website shows 22 to 27. Confirm the small end before ordering. As with all Scarpa ski boots the shell breaks on the half size, so a 25.5 and a 26.0 share a shell length with liners lasted to each half size.
Our Verdict
The Scarpa F1 RS Women’s is the boot for skiers who want race weight and a touring fit at the same time. Overlap Flow entry and the BOA H+1 closure make it genuinely fast to get into and out of, 1,210 g per boot in a 25 undercuts most 100-flex touring boots, and a 101 mm last keeps it wearable for feet that a 99 mm race shell would not suit. The open question is the sole: Scarpa publishes no ISO norm for the Vibram FS outsole while listing AT compatibility, so we treat it as a pin-binding boot until they confirm otherwise. On a pin setup it is a strong, light choice.
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