The Tecnica Mach 1 130 LV is a perfect boot for expert skiers that have a narrow foot, narrow leg shape, and a tall instep. Tecnica's C.A.S (Custom Adaptive Shape) shell and liner are designed to be tweaked by a skilled bootfitter to give you the ultimate in performance and comfort. The C.A.S. Liner utilizes cork that surrounds the foot that can be heated, punched or grinded down for small fit issues. The C.A.S. Shell has small dimples in strategic places that give you an accurate atomically correct shape, and those dimples give a bootfitter the chance to heat the boot faster, and the shell can hold shape after it has been pressed for a better performance. The i-Rebound Construction has four metal to metal connection points that give you a powerful forward flex, rearward support, and a high amount of rebound with every turn. Tecnica's Quick Instep Construction has a softer injected plastic over the instep that allows you to easily enter and exit the boot. The Mach 1 130 has a 45mm Power Lock Strap that will give you a tight wrap across your shin, and add even more rebound to the boot. If you are an aggressive expert looking for a low volume fit, with a boot that is a powerhouse, the Tecnica Mach 1 130 LV is the boot for you.