The RS 90 SC is a high-performance junior race boot with a short cuff for smaller athletes. The 97mm last, mono-injection shell with Control Fit delivers World Cup power and precision with an exact, race-inspired fit. The neutral, upright stance provides more efficient power transfer and less quad fatigue. Control Fit addresses traditional hard-to-fit issues, alleviating common pressure points and increasing circulation to deliver award-winning "out-of-the-box" fit and performance.LAST: 97 (last for all high performance, technical skiers looking for the best compromise between performance and comfort. An Anatomical and precise fit in both the heel and medial portion of the foot; good "Toe Box" volume); CONTROL FIT TECHNOLOGY (shell engineering with the foot scanning system, allows for a more accurate and precise fit of Lange boots.Shell design: Anatomically contoured heel cap provides better retention, and perfect ski control. Tapered mid-foot area holds the navicular and cuboid without applying too much pressure or being too loose; and delivers control for narrow and wide feet. Accurate in-step height, moderate upper flaps allow a comfortable fit for a wider range of in-steps and guarantees the perfect wrap. Asymmetrical toe box provides the proper volume to comfortably fit the toes without compromising control and feeling. It also allows for better thermo insulation); NATURAL SKI STANCE (Lange employs the unique Natural Ski Stance that allows skiers to stand a little straighter for more efficiency and less fatigue)FLEX: 90; BOOTBOARD: hard PU foamFLEX ADJUSTMENT: 2 screwsPOWER STRAP: 40 mmBUCKLES (Lange Junior boots feature aluminium buckles for increased resistance and efficient closure)POWER WEDGE SHAFT (Better wrapping of upper leg, enhances precision and sensitivity by eliminating any gap between shin and tongue).