La Sportiva Stratos Hybrid Alpine Touring Boot Ski Boots - Touring Boots - Race La Sportiva
La Sportiva Stratos Hybrid Alpine Touring Boot Ski Boots - Touring Boots - Race La Sportiva
La Sportiva Stratos Hybrid Alpine Touring Boot Ski Boots - Touring Boots - Race La Sportiva
La Sportiva Stratos Hybrid Alpine Touring Boot Ski Boots - Touring Boots - Race La Sportiva
La Sportiva Stratos Hybrid Alpine Touring Boot Ski Boots - Touring Boots - Race La Sportiva
La Sportiva Stratos Hybrid Alpine Touring Boot Ski Boots - Touring Boots - Race La Sportiva
La Sportiva Stratos Hybrid Alpine Touring Boot Ski Boots - Touring Boots - Race La Sportiva
La Sportiva Stratos Hybrid Alpine Touring Boot Ski Boots - Touring Boots - Race La Sportiva
La Sportiva Stratos Hybrid Alpine Touring Boot Ski Boots - Touring Boots - Race La Sportiva
La Sportiva Stratos Hybrid Alpine Touring Boot Ski Boots - Touring Boots - Race La Sportiva
La Sportiva Stratos Hybrid Alpine Touring Boot Ski Boots - Touring Boots - Race La Sportiva
La Sportiva Stratos Hybrid Alpine Touring Boot Ski Boots - Touring Boots - Race La Sportiva

La Sportiva Stratos Hybrid Alpine Touring Boot

$1,399.00
Size
Build your dream setup!
Boot Fitters Advice
Description

The La Sportiva Stratos Hybrid Alpine Touring Boot is a 781 g skimo race and speed-touring boot with a 100.5 mm last, an 85-degree range of motion, and a Stratos VI carbon cuff on the Kilo lower.
Tech Specs
View details
Skimo Race and Speed-Touring Boot

La Sportiva Stratos Hybrid Alpine Touring Boot

The La Sportiva Stratos Hybrid Alpine Touring Boot is built for racers and speed tourers who want an 800-gram-class boot that fits a wider race foot. A 100.5 mm last leaves room a narrow race shell does not, and a carbon-fiber cuff on a Grilamid Bio-Based LF Carbon lower, a carbon-reinforced renewable nylon, supplies race-grade lateral support. At 781 g per boot in a 27.5, with 85 degrees of cuff rotation and a single-lever race transition, the La Sportiva Stratos Hybrid suits race courses, structured training and fast traverses.

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

Is This the Right Boot for You?

Best For
Skimo racers and fast-and-light tourers who want an 800-gram-class boot with a huge 85-degree stride, a quick single-lever transition, and enough width to fit a wider race foot on skinny skis up to 85 mm underfoot.
Consider Another Boot If
You want a downhill-oriented boot for wider skis and variable snow, need real forward support, or want frame, MNC, or alpine binding compatibility. The Stratos Hybrid is a race tool, not a general touring boot.

CCBB Boot Ratings

Uphill Efficiency
5/5
85 degree ROM at 781 g
Downhill Performance
3/5
Race-grade support only
Walking Comfort
5/5
Race-boot glide
Transition Speed
5/5
Single throw latch

Rating scale: 5 = top of its class, 4 = excellent, 3 = good, 2 = specialized or below average, and 1 = limited.

CCBB Fit Profile

Overall VolumeMedium
Toe BoxTapered
Forefoot VolumeMedium
Instep HeightMedium
Heel HoldGood
Ankle HoldGood
PunchabilityModerate
Heat MoldableYes

Why We Like It

  • At 781 g per boot in a 27.5, the Stratos Hybrid sits in the 800-gram race class while costing less than the carbon Stratos VI.
  • The 85-degree range of motion is among the longest strides available, ideal for racing and fast traverses.
  • The single buckle with a race throw latch transitions in one motion when the clock is running.
  • Anti-wear bushings connect the carbon-fiber cuff to the Grilamid lower for a frictionless, durable pivot.
  • The Stratos Hybrid uses the Kilo lower shell, one of the wider and more accommodating race fits on the market.
  • S4 inserts speed step-in with Ski Trab bindings, and full crampon compatibility handles technical objectives.

Best Uses

  • Skimo racing and structured training
  • Fast-and-light traverses and speed touring
  • Technical ski mountaineering where weight is critical
  • Skinny race and mountaineering skis up to 85 mm underfoot
  • Racers who need more volume than a Pierre Gignoux or Alien

Bootfitter's Advice

The Stratos Hybrid uses the Kilo lower shell and a 100.5 mm last, which makes it one of the wider, higher-volume race boots we fit. After fitting hundreds of skiers, we find it a good option for racers who run out of room in a Scarpa Alien or find a Pierre Gignoux too low over the foot; at the ball it is close to a Pierre Gignoux in width, with more height and more taper at the toes. The shared Kilo lower holds the heel in a narrow pocket, and the pointed toe box opens up with heat molding. The shell splits on the full size, so a 28 runs longer than many race boots; take your usual size rather than sizing down.

The carbon-infused Grilamid lower punches like an Alien: it will move a little but springs back and cannot be pushed as far as a plain plastic boot. The thin race liner leaves room for a warmer aftermarket liner if you plan to use the Stratos Hybrid for long backcountry days rather than pure racing, and expect a small amount of play in the cuff pivots that is normal for a carbon race boot.

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: 781 g per boot (size 27.5)
Last: 100.5 mm (size 26.5)
Flex: La Sportiva assigns no numeric flex. Race-grade lateral support with a soft, quick forward feel typical of a skimo boot.
Range of Motion: 85 degrees
Shell: Grilamid Bio-Based LF Carbon lower (shared with the Kilo)
Cuff: Carbon fiber, borrowed from the Stratos VI, on anti-wear bushings

Features and Compatibility

Walk Mode: Ski/walk mechanism with a single-lever race transition
Closure: 1 buckle with a race throw latch and Force Lite Closure System
Binding Compatibility: Pin-tech (low-tech) race bindings only. La Sportiva's FriXion Wave Race sole meets ISMF race-sole geometry, not ISO 5355 or ISO 9523, and the boot carries certified tech (pin) inserts with full crampon compatibility. Not compatible with frame, MNC, or alpine bindings.
Sole: FriXion Wave Race outsole (ISMF race-sole standard) with certified tech inserts and full crampon compatibility
Forward Lean: 10, 13.5, 17, and 19 degrees
Liner: Ultralon Stratos Hybrid race liner

Compare the La Sportiva Stratos Hybrid

La Sportiva Stratos Hybrid vs. Dynafit DNA

Both are dedicated skimo race boots. The Dynafit DNA is a full-carbon boot that skis a touch better on wider skis, while the Stratos Hybrid runs wider and higher in volume with a longer 85-degree stride and an easier single-lever transition, which many racers prefer for comfort over long days.

Shop Dynafit DNA boots

La Sportiva Stratos Hybrid vs. Scarpa Alien 1.1

The Scarpa Alien 1.1 is a proven carbon race boot that runs narrower and lower in volume, while the Stratos Hybrid is wider and more forgiving through the midfoot and uses a Grilamid lower rather than full carbon. We steer wider race feet to the Stratos Hybrid.

Shop Scarpa Alien 1.1 boots

La Sportiva Stratos Hybrid vs. La Sportiva Kilo

The Stratos Hybrid and the La Sportiva Kilo share the same lower shell, but the Stratos Hybrid is a lighter race boot at 781 g with an 85-degree stride and a single race buckle, while the Kilo is a heavier touring boot with three buckles and more downhill support.

Shop La Sportiva Kilo boots

Common Questions

Who should buy the La Sportiva Stratos Hybrid?
The La Sportiva Stratos Hybrid suits skimo racers and fast-and-light tourers who want an 800-gram-class boot with an 85-degree stride and a one-motion transition, and who ski skinny race or mountaineering skis up to 85 mm underfoot.
Does the Stratos Hybrid race sole meet an ISO binding norm?
No. The Stratos Hybrid uses a FriXion Wave Race sole that meets ISMF race-sole geometry, not ISO 5355 or ISO 9523. It carries certified tech inserts and works with pin-tech (low-tech) bindings only. It is not compatible with frame, MNC, or alpine bindings.
What flex does the Stratos Hybrid have?
La Sportiva assigns the Stratos Hybrid no numeric flex, which is normal for a race boot. It offers race-grade lateral support with a soft, quick forward feel, so we do not present it as a stiff downhill boot. It is built for the uphill and fast, controlled descents on light skis.
How is the Stratos Hybrid different from the Stratos VI?
The Stratos Hybrid borrows the carbon-fiber cuff from the ultra-high-end Stratos VI but sets it on a carbon-infused Grilamid Kilo lower instead of a full-carbon shell. That makes the Stratos Hybrid more durable and far more affordable, while the Stratos VI is lighter and stiffer for elite racing.
How wide is the Stratos Hybrid fit?
The Stratos Hybrid uses the Kilo lower and a 100.5 mm last, which makes it one of the wider, higher-volume race boots available. The toe box tapers to a point and the heel pocket is narrow, but it fits racers who find a Scarpa Alien too narrow or a Pierre Gignoux too low in volume, and the toe box opens with a liner heat mold.
Can I use the Stratos Hybrid for regular backcountry touring?
Yes, for fast-and-light touring on skinny skis. The Stratos Hybrid walks superbly at 781 g with an 85-degree range of motion, but the thin race liner and race-grade support mean it is not a substitute for a heavier touring boot on wider skis or in variable snow.
Which bindings step in easiest with the Stratos Hybrid?
The Stratos Hybrid has S4 inserts with a groove designed for stepping into Ski Trab bindings without holding them open. It works with any standard pin-tech binding, and the S4 feature simply speeds entry for Ski Trab users.
Can the Stratos Hybrid be punched or molded?
The Ultralon race liner heat molds, and the carbon-infused Grilamid lower accepts limited punching, similar to a Scarpa Alien. The shell springs back and cannot be pushed as far as a plain plastic boot, so plan fit work around the liner mold and small, targeted adjustments.
Is cuff play in the Stratos Hybrid normal?
A small amount of play in the cuff pivot bushings is normal for the Stratos Hybrid, as it is for carbon race boots like the Pierre Gignoux and Dynafit DNA. Tightening the bushings usually does not remove it, so reach out to us before attempting any adjustment.

Our Verdict

The La Sportiva Stratos Hybrid is a smart choice for racers who want most of the Stratos VI experience at a fraction of the price. It gives up the full-carbon lower of its higher-end sibling, but in return it is durable, wider than most race boots, and light at 781 g with an 85-degree stride and a one-motion transition. It fits a wider race foot on a 100.5 mm last, pairs with skinny skis up to 85 mm, and runs pin-tech race 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.