Anatomically profiled MX specific boots Alpinestars Boot Lightweight innovative microfiber Breathable textile lining Inside with patterned high-tech polymer Aluminum buckle system Innovative lateral ankle protection Instep and Achilles accordion flex zones Plastic-reinforced insole with hot-dip galvanized steel insert and toe reinforcement Extended microfiber gaiter New closure system with aluminum buckles and aluminum frame with innovative self-alignment and quick-release buckles Breathable inner lining with anti-slip microfiber insert on the heel Removable, anatomical footbed Sole, footrest insert, instep straps and buckles are interchangeable 92 % Polyurethane / 6 % Rubber / 2 % Leather 3GG230012705 (44.5/10) 3GG230012706 (45.5/11)