Black Diamond Quadrant Alpine Touring Ski Boots 2011: Black Diamond’s premier 4-buckle freetouring boot, the Black Diamond Quadrant defies convention by bringing skiing performance and stiffness previously reserved for freeride boots to the touring weight range. Designed with technical mountains like La Grave in mind, where long climbs lead to no-fall-zone skiing, this boot matches touring comfort and minimal weight with the power and performance to drive big, 95 mm-plus waisted skis in high-consequence terrain. Thanks to its patent-pending Pivoting Cuff Technology, the Black Diamond Quadrant Alpine Touring Ski Boots have introduced a level of performance that's never before been possible in a lightweight boot.