Without even touching the Alien 3.0, you know it’s fast. It looks fast. The Dyneema® and carbon-fiber say it’s fast. Now step in: 60-plus degrees of ankle mobility, 580g, and the fastest, most reliable ski/walk mode ever designed. The Italians do race performance?whether it’s bikes, cars, or ski boots?better than anyone, and the Alien 3.0 is proof. Fast, stiff, and totally driven by performance.Size: 39-44, (whole only)Weight: 575g, 1lb 4.3oz (1/2 pair size 42)Shell | Cuff: Carbon T300 Carbon + Pebax®Liner: Intuition® Race 3.0Last: 99 mmWalk/Ski Mode: Speed Lock LiteBuckles: 1 + BOA®Forward Lean: 14° & 18°Range of Motion: 71°Sole: Vibram® UFO 3.0Binding System: TLT (Optimized touring pivot -5mm)Origin: ItalyProduct Number: 12167-500.1Award-Winning Ski-Walk MechanismBOA® Closure SystemBuilt-In Zipper Closure GaiterCarbon CuffCarbon Lower ShellSimple Dyneema® Cord Closure