Unfiltered performance is what you get when you put on the Head Vector EVO 100 Ski Boots. That's because they're built using a Bi-Injected shell, which uses stiffer materials where you need support and response, and less dense materials in other areas to improve wrap and hold your foot more securely. The canted design allows you to apply more even pressure to your outside edges, and the tuneable rear spoiler eliminates shin bang when you're charging hard.