Looking for a high performance mid volume boot that can handle anything you throw at it without the punishing feel of stiffer options We think the Tecnica Mach1 MV 95 W Ski Boots are best in class, balancing all-day comfort with a moderately firm flex that should satisfy all but the most aggressive skiers. The C. A. S. Liner is warm and highly moldable without sacrificing an ounce of performance, and women's specific design throughout means it's tuned to your anatomy for the most comfortable stance when you're lacing turns downhill.