The SRS (Sole Replacement System) interchangeable sole has an innovative design and a revolutionary replacement system. Design and technology are patented by Sidi. The base of the soles, or boat, features a more aggressive look and is slightly higher for greater engagement with the upper. The tip and heel are fixed, while the central part, subject to greater wear, is replaceable. The tip has a special design with traction grooves for greater grip, also ideal for Enduro. The heel area has a fixed insert in soft PU that makes the boot more stable and offers increased traction against the bike. The central part of the sole is made of a rubber insert studied with a new interlocking Dovetail system and 4 screws for easy replacement. Functional design for motocross.