The Mach1 115 W is the benchmark for performance, fit and customization in the women’s high-performance ski boot world. Grounded in the fundamentals of high-performance women’s specific ski boot design, the boot features T-Drive technology which is a revolutionary carbon fiber shell to cuff connection that allows the boot to function in a much more efficient way, resulting in a smoother more consistent flex, better performance and less energy required to ski at a high level.