ALIEN 4.0

Pure speed, maximum precision, the Alien 4.0 is SCARPA's lightest, most advanced ski mountaineering boot ever. Built for elite racers and high-efficiency tourers, it delivers race-grade performance with technical refinement inspired by SCARPA's World Cup heritage. The carbon-fiber shell and cuff provide unmatched stiffness and ultralight weight, giving athletes direct energy transfer and instant response. The Speed Lock Lite mechanism offers a 76-degree range of motion for a fluid, natural stride on steep climbs. The BOA® Fit System ensures quick, micro-adjustable closure, while the Intuition® Race 4.0 SL liner delivers warmth, comfort, and precision fit in a feather-light package. A Vibram® UFO 4.0 sole gives dependable traction on rock, ice, and refrozen snow.

Every detail is engineered for one goal: maximum speed with total control.

• Full carbon-fiber shell and cuff deliver ultimate torsional rigidity and strength at the lightest possible weight.
• Speed Lock Lite walk mode provides a 76-degree range of motion for efficient uphill movement and secure downhill control.
• BOA® Fit System enables quick, precise, glove-friendly adjustments for a locked-in feel.
• Intuition® Race 4.0 SL liner offers heat-moldable fit, warmth, and low-profile comfort for long, cold alpine pushes.
• Vibram® UFO 4.0 sole ensures reliable traction and grip on icy approaches and technical transitions.

The Alien 4.0 is pure carbon speed built for racers who turn every climb and descent into performance perfected.