All-in performance. The Lange RS 120 MV Ski Boots 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 120 flex suits skiers seeking a performance boot with a more forgiving flex.