The Surge marched to top scores for its balanced stance, even fit, and top-tier performance for bigger, stronger skiers with thick feet to match. The 100-mm last is roomier than the category norm in the lower, offering C-130 cargo space through the midfoot and at the cuff, yet it provides sufficient containment at the instep, heel, and ankle. Testers with meatier feet filled the interior cavity enough to characterize it as quick and solid. Skinny-footed guys clanged around inside a bit. "Flex seemed perfect. It's quick but likes to cruise too." Notes: The polyurethane cuff combines with tri-injection polyether construction in the lower (3D Power Frame Architecture) to enable easy entry and exit, Contour4 fit shape wrapping and solid edge power. All Viper and Mantis boots share the same all-mountain stance geometry (Center-Balance Stance). 45 mm power straps, cuff adjustment, and adjustable height rear spoilers on all men's models.