Designed with input from their Women 2 Women program, the Mach 1 MV 105 with T-Drive Technology is a high-performance ski boot specifically designed for strong female skiers with medium-volume feet. Fit is what sets these boots apart and it is provided by the C. A. S. technology in the liner and cuff that molds to your feet. Meanwhile, the flex rating of 105 gives this boot the power and support we need to charge all over the mountain with control and confidence.