La Sportiva Kilo XTR Alpine Touring Boot Ski Boots - Touring Boots - Ski Mountaineering - Mens La Sportiva
La Sportiva Kilo XTR Alpine Touring Boot Ski Boots - Touring Boots - Ski Mountaineering - Mens La Sportiva
La Sportiva Kilo XTR Alpine Touring Boot Ski Boots - Touring Boots - Ski Mountaineering - Mens La Sportiva
La Sportiva Kilo XTR Alpine Touring Boot Ski Boots - Touring Boots - Ski Mountaineering - Mens La Sportiva
La Sportiva Kilo XTR Alpine Touring Boot Ski Boots - Touring Boots - Ski Mountaineering - Mens La Sportiva
La Sportiva Kilo XTR Alpine Touring Boot Ski Boots - Touring Boots - Ski Mountaineering - Mens La Sportiva

La Sportiva Kilo XTR Alpine Touring Boot

$1,277.00
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Description

The La Sportiva Kilo XTR Alpine Touring Boot is a 1,247 g mid-weight ski mountaineering boot with a 100.5 mm last, claimed 120 flex, and a Force Flex tongue for touring skis up to 100 mm.
Tech Specs
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Mid-Weight Ski Mountaineering Boot

La Sportiva Kilo XTR Alpine Touring Boot

The La Sportiva Kilo XTR Alpine Touring Boot is built for ambitious ski mountaineers who want more forward drive than a tongueless boot gives. A 100.5 mm last fits medium feet with a narrow heel, and a Force Flex tongue in Pebax Rnew, a renewable castor-oil-based plastic, over a Grilamid Bio-Based LF Carbon shell carries a claimed 120 flex that skis firm and progressive. At 1,247 g per boot in a 27.5, with 68 degrees of cuff rotation, the La Sportiva Kilo XTR drives touring skis up to 100 mm underfoot on long days.

Expert Fit Review Fit profile and recommendations reviewed by CCBB bootfitters.

Is This the Right Boot for You?

Best For
Ski mountaineers with medium-width feet and a narrow heel who want a mid-weight, tongue-backed boot that skins efficiently and drives touring skis up to 100 mm underfoot.
Consider Another Boot If
You want the tongueless La Sportiva Kilo's lighter uphill, have a very narrow forefoot or need a square toe box, or need the damping and frame or MNC compatibility of a freeride boot.

CCBB Boot Ratings

Uphill Efficiency
5/5
68 degree ROM at 1,247 g
Downhill Performance
4/5
Progressive tongue support
Walking Comfort
4/5
Strong once buckles are set
Transition Speed
4/5
Tilt-Lock Lite lever

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 BoxTapered, pointed
Forefoot VolumeMedium
Instep HeightMedium
Heel HoldGood
Ankle HoldGood
PunchabilityModerate
Heat MoldableYes

Why We Like It

  • The Pebax Rnew Force Flex tongue gives the Kilo XTR a progressive forward flex that drives skis better than the tongueless Kilo.
  • At 1,247 g per boot in a 27.5, the Kilo XTR stays in the mid-weight class while skiing close to heavier boots.
  • The 68-degree range of motion keeps the skin track efficient once the buckles and power strap are loosened.
  • The Ultralon high-density liner, the same foam family used in Intuition liners, molds to the foot and adds warmth.
  • The WarmSole platform separates the foot from the carbon shell for cold winter belays.
  • The Tilt-Lock Lite ski/walk mechanism is quick and secure, and the FriXion Wave Alpine XTR sole grips well on rocky approaches.

Best Uses

  • Ski mountaineering and everyday backcountry touring
  • Big-vertical days that still demand a confident descent
  • Touring skis 90 to 100 mm underfoot
  • Cold-weather missions where warmth matters
  • Medium-width feet with a narrow heel

Bootfitter's Advice

The Kilo XTR shares the Kilo lower shell and its 100.5 mm last: fairly wide through the ball and midfoot, a tight, narrow heel pocket, and a lot of taper toward the toes, so overall volume reads lower than the last width suggests. After fitting hundreds of skiers, we find it narrower and more pointed at the toe than the Atomic Backland XTD, with a tighter heel than most boots at this weight. Skiers who need sixth-toe clearance should plan on shell work.

Getting the full 68-degree range of motion takes a moment of fiddling with the upper buckle and power strap at transitions, so practice the routine. The carbon-infused Grilamid shell heat molds and accepts limited punching, and the Ultralon liner packs slightly over time, so we set the initial fit a hair snug through the instep.

Fit profile reviewed by CCBB bootfitters. Final sizing should be confirmed with a shell fit whenever possible.

📏 Technical Specifications Manufacturer specs · Click to expand

Fit and Construction

Weight: 1,247 g per boot (size 27.5) as we weigh it. La Sportiva states 1,190 g at size 26.5.
Last: 100.5 mm (size 26.5)
Flex: Claimed 120 by La Sportiva via the Force Flex tongue. It is stiff and progressive for a mid-weight touring boot, but skis softer than a plastic-shelled 120 freeride boot.
Range of Motion: 68 degrees (33 back, 35 front)
Shell: Grilamid Bio-Based LF Carbon
Cuff: Grilamid Bio-Based LF Carbon with a Pebax Rnew Force Flex tongue

Features and Compatibility

Walk Mode: Tilt-Lock Lite ski/walk lever, glove friendly
Closure: 2 Force buckles with the Force Flex tongue, Force Power Buckle, and power strap
Binding Compatibility: Pin-tech (low-tech) bindings only. La Sportiva's FriXion Wave Alpine XTR sole meets ISMF race-sole geometry, not ISO 5355 or ISO 9523, and the boot carries certified tech (pin) inserts. Not compatible with frame, MNC, or alpine bindings.
Sole: FriXion Wave Alpine XTR outsole (ISMF race-sole standard) with certified tech inserts and an internal WarmSole platform
Forward Lean: 12 and 14 degrees
Liner: Ultralon high-density thermo-moldable Kilo XTR liner

Compare the La Sportiva Kilo XTR

La Sportiva Kilo XTR vs. La Sportiva Kilo

The Kilo XTR adds a Pebax Rnew Force Flex tongue for a claimed 120 flex and firmer forward drive, at 128 g more per boot than the tongueless La Sportiva Kilo. The Kilo walks more freely and weighs less, while the XTR skis with more support in variable snow.

Shop La Sportiva Kilo boots

La Sportiva Kilo XTR vs. Scarpa F1

Both are mid-weight touring boots that blend a good uphill with a workable descent. The Scarpa F1 uses a BOA and a carbon-infused tongue and steps into a wide range of tech bindings, while the Kilo XTR relies on buckles and a Force Flex tongue and runs a hair wider through the forefoot.

Shop Scarpa F1 boots

La Sportiva Kilo XTR vs. Tecnica Zero G Peak Carbon

The Tecnica Zero G Peak Carbon is lighter with a more progressive carbon flex and a roomier toe box, while the Kilo XTR holds the heel tighter, tapers more at the toe and adds a WarmSole insert for cold days. We steer narrow, weight-focused skiers to the Peak Carbon and medium feet with a narrow heel to the Kilo XTR.

Shop Tecnica Zero G Peak Carbon boots

Common Questions

Who should buy the La Sportiva Kilo XTR?
The La Sportiva Kilo XTR suits ski mountaineers with medium-width feet and a narrow heel who want a mid-weight boot that skins efficiently and still drives touring skis up to 100 mm underfoot, with more forward support than the tongueless Kilo.
Is the Kilo XTR really a 120 flex?
La Sportiva rates the Kilo XTR at 120 via its Pebax Rnew Force Flex tongue, and it is genuinely stiff and progressive for a mid-weight touring boot. That said, we find it skis softer than a plastic-shelled 120-flex freeride boot, so treat the number as a light-boot 120 and pair it with skis up to 100 mm.
How is the Kilo XTR different from the standard Kilo?
The Kilo XTR uses the same lower shell and 100.5 mm last as the Kilo but adds a Pebax Rnew Force Flex tongue and a two-buckle plus power strap closure for a claimed 120 flex. It weighs 128 g more per boot and skis with firmer forward support, while the tongueless Kilo walks more freely.
What bindings work with the La Sportiva Kilo XTR?
The La Sportiva Kilo XTR works with pin-tech (low-tech) bindings only. Its FriXion Wave Alpine XTR sole meets ISMF race-sole geometry rather than ISO 5355 or ISO 9523, and it carries certified tech inserts. It is not compatible with frame, MNC, or alpine bindings.
What foot shape fits the Kilo XTR best?
The Kilo XTR fits a low- to medium-volume foot with a fairly wide ball and midfoot, a narrow and secure heel, and a pointed, tapered toe box. Medium feet that want a locked heel do well, while skiers who need a square toe box or sixth-toe room should plan on shell work.
How does the Kilo XTR walk?
The Kilo XTR offers a 68-degree range of motion that skins efficiently, though the tongue means you need to open the upper buckle and power strap for the full stride. Once set, it walks well for a boot with this much downhill support.
Is the Kilo XTR warm enough for winter touring?
The Kilo XTR pairs a WarmSole platform with a molded Ultralon liner, which makes it one of the warmer boots in its weight class and a reasonable choice for cold winter mountaineering.
Can the Kilo XTR shell be punched or molded?
The Ultralon liner heat molds for a custom fit, and the carbon-infused Grilamid shell accepts limited, professional punching. Because the shell springs back, we build most of the fit around the liner mold and small, targeted shell adjustments.
What skis pair well with the Kilo XTR?
The Kilo XTR pairs best with touring skis 90 to 100 mm underfoot. It has enough support to drive a 100 mm ski in most conditions, but skiers charging wide, heavy skis in firm snow will still prefer a heavier four-buckle boot.

Our Verdict

The La Sportiva Kilo XTR is a strong mid-weight option for tourers who want a real descent without carrying a heavy four-buckle boot. The Force Flex tongue and claimed 120 flex give firmer forward drive than the tongueless Kilo, and at 1,247 g with a 68-degree range of motion the XTR still skins efficiently. It fits medium feet with a narrow heel and a tapered toe, pairs with skis up to 100 mm, adds real warmth through the WarmSole and Ultralon liner, and runs pin-tech bindings only.

Frequently Asked Questions

What foot shape works best?

Low- to medium-volume feet with a lower instep and secure heel.
Does it punch well?

Minor boot fitting is possible, but race boots are less forgiving to modify than heavier Grilamid touring boots.