AXO A2 Boots (White, Size 13) Our newest innovation yet. With over 2 years of development, including a new metal buckle system, the A2 boot surpasses any boot we have designed in the past. They are a class above the rest and built to withstand the toughest of competitions for the most experienced riders. New reinforced nylon anti-torsion brace designed with a hinge system Traditional easy-to-replace sole AXO engineered aluminum buckles for an enhanced lock/unlock operation Adjustable buckle base positioning