Designed without compromise for the demands of ski mountaineering competition, the Scarpa Alien 5.0 Carbon Silver embodies a radical vision of the ski touring boot: reducing weight to the absolute minimum without sacrificing energy transfer on the descent. Co-developed with elite ski mountaineering athletes, it is designed for the most demanding enthusiasts—those seeking to push their limits in ski mountaineering races as well as on technical high-mountain excursions. The tension between lightness on the ascent and efficiency on the descent is resolved here through radical material choices and precision engineering.
The number that sums up the ambition of the Scarpa Alien 5.0 Carbon Silver comes down to just a few grams: 610 g per half-pair in size 27. This weight is made possible by a shell and collar constructed entirely of carbon, a material that offers high structural rigidity with minimal mass. On the ascent, the Speedlock Lite walking mode provides 76° of range of motion—an amplitude that allows for a natural, fluid stride even on steep slopes, without restricting the ankle or forcing an unnatural posture. This level of freedom of movement is crucial on long climbs where every bit of energy saved counts. The adjustable forefoot angle—between 9° and 13° or 11° and 15°, depending on the configuration—allows you to adapt the boot’s geometry to the shape of your foot and the terrain.
Switching the Alien 5.0 Carbon Silver to ski mode radically transforms the boot’s performance. With a flex rating of 110, the carbon shell ensures direct power transfer from the foot to the ski, with no energy loss during flex. The carbon cuff contributes to this secure fit by precisely wrapping around the shin, providing lateral support that remains reliable on groomed snow or in challenging terrain. The 99 mm forefoot width creates a snug fit, designed for narrow to standard-width feet, promoting contact and responsiveness in every turn.
The fit of the Scarpa Alien 5.0 Carbon Silver relies on a combination of complementary systems. Here are the elements that make up this closure and comfort system:
The Vibram® UFO 4.0 outsole guarantees reliable traction on the varied terrain encountered in ski mountaineering, from wet rock to snow-to-ice transition zones. Binding compatibility is based on the TLT system with an optimized 5 mm pivot, designed for Low Tech insert bindings—the industry standard in competitive ski mountaineering. This boot is made in Italy and meets current PFAS standards.
For ski mountaineering competitors and alpinists seeking a ski touring boot built for pure performance, the Scarpa Alien 5.0 Carbon Silver offers a technically sound solution: 76° of range of motion on the ascent, 610 g per foot, 110 flex on the descent. A tool designed for those who don’t want to choose between ascent speed and efficiency on the slope.
Founded in 1938 in Asolo, at the foot of the Dolomites,Scarpais an iconic Italian brand in the world of mountaineering. Specializing in mountaineering, hiking, climbing, and ski touring boots, Scarpa combines traditional craftsmanship, technological innovation, and a love of the great outdoors. Synonymouswith reliability and performance, every pair of Scarpa shoes is designed to go further, higher, and more freely.
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The Scarpa Alien 5.0 Carbon Silver, among the top competition ski touring boots, is designed for unisex ski mountaineers seeking ultimate performance: a full-carbon shell and cuff weighing 610 g per half-pair, a flex rating of 110 for precise control on descents, and 76° of range of motion in walk mode via the Speedlock Lite system. The lacing system combines laces and the BOA® Fit System for a quick and secure fit, while compatibility with TLT bindings featuring inserts ensures optimal power transfer to the ski.
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