The new X-3 is Sidi’s most cost effective way to experience professional level boots. And now it is available with a sole that you can replace at home! Made with the same laminated Technomicro, it features the same cam lock buckles, Cambrelle® inner lining, heel and insole, and the revolutionary sole replacement system as the higher end boots. Laminated Technomicro is used as the base material. Sole replacement system can be replaced with a flathead screwdriver and her sole is made of anti-skid rubber and can be replaced by a cobbler. TA sole features excellent rear brake feel. Nylon insole no dangerous steel shank! Removable arch support. Inner heat shield. Internal malleolus plastic guard with ergonomic closed cell foam padding internally to enhance protection of those tender small foot bones. Toe area covered in protective plastic. Rigid, shock resistant, anatomically shaped heel for maximum protection. Replaceable micro adjustable cam lock buckle system with memory straps. Lower buckle protected against opening because of an impact by a guard. Cambrelle® lining. All bolt-on parts are replaceable. Slim, cool non-bootie design. Single Flex System upper.