Tecnica Mach 1 LV 105The Mach1 LV 105 W is a sporty women specific ski boot built on a narrow last. With a flex rating of 105, this boot features Tecnicas C. A. S. (Custom Adaptive Shape) system with numerous fit solutions for the shell and liner, including a new thermoformable cuff. Tecnica has covered the liner in lambs wool with Celliant micro crystals. These convert body heat into infrared radiation, which stimulates blood circulation thereby increasing warmth. The