Tecnica's Mach1 130 MV Men's Ski Boot isn't the tightest fitting boot on the market MV signifies medium volume, and the 100mm last is made for wider feet but it's still designed to rip. The 130 flex won't be overwhelmed unless you're a 180 pound World Cup dreamer, and the ratcheting power strap and micro adjustable buckles lock the shell and cuff down solidly against the liner, so you won't have to suffer slop just to enjoy killer performance. You won't have to fight through pain, either, because Tecnica designed the Mach1 to be as customizable as they come. It features a C. A. S. Ultrafit Pro Race heat moldable liner for serious personalization, along with a C. A. S. bootboard and C. A. S. shell that are designed to be ground and punched by bootfitters to improve fit and alignment C. A. S. stands for custom adaptive shape, if you're wondering. The Mach1 also sports Tecnica's Quick Instep panel, a softer piece of plastic around the instep that makes it easier and less painful to get your boots on and off.