Finding comfort without sacrificing performance to get it isn't always the easiest thing in the world, but Tecnica's figured it out perfectly in the Mach1 110 C.A.S. Men's Ski Boot. A moderately wide 100mm last fits most feet comfortably, a 110 flex lets you ski the whole mountain without overwhelming your boot or getting the feeling that its controlling you. The dialed-in fit of the Mach1 is tough to match, too—the C.A.S. UltraFit Pro liner is specially designed to align with the anatomically-molded shell, preventing tight spots, slop, pinching, and packing out, and is also heat-moldable if you want to fine tune the out-of-the-box fit. The canting and flex are adjustable, too, if you're still looking for more customization.