More Streamlined and Aerodynamic Than Ever: The RS race boot is more aerodynamic than ever thanks to our partnership with the Formula 1 Sauber-Alfa Romeo Racing team. Together, we developed the most aerodynamic ski boot on the market. The 'Air Flow' concept was born in their laboratory and shapes the future of sport. It's a revolutionary technology that optimizes the shape of the 3D-molded shell and introduces new buckles to reduce the coefficient of friction and air drag. Race Flex Control: Our all-new Air Flow technology is complemented by another flagship innovation: Race Flex Adjust, a plate at the back of the boot that enhances energy transmission between the shell and the cuff. The plate replaces the two conventional screws familiar to all racers and offers the ability to soften the flex without creating play or energy loss. Out-of-the-Box Comfort, Precise Control: Customizable Dual 3D liners are preformed around the foot and ankle for out-of-the-box comfort that lets you explore more Lightweight and Durable: Aluminum buckles offer reduced weight and increased strength for efficient closure and long-term durability Precise, Low Volume Fit: Our Low Volume 97mm last is designed for low volume feet or skiers seeking a precision fit without sacrificing comfort Flex: 110 Last: 97mm The Lange RS 110 SC LV Ski Boots feature a shorter cuff and flex suited to smaller skiers. They maximize speed and power transfer with race-proven tech and an innovative wind tunnel tested aero design.maximize speed and power transfer with race-proven tech and an innovative wind tunnel tested aero design. From the targeted power of Dual Core construction to its anatomical foot-hugging design, the RS responds to your every move as a natural extension of the body to maximize the efficiency and explosive power of every turn. It's built for expert skiers, instructors and racers looking for speed, power and precision on snow. A 110 flex suits lighter skiers and those seeking a performance boot with a more forgiving flex. Lange Youth RS 110 SC Ski Boot