3-layer sole construction made of non-slip nylon fabric, orthopedic 3D padding, and recycled fiberglass shell. Developed in collaboration with Solestar, the specialist in insoles. IP3 insoles support and stabilize the power flow from the legs through the feet directly into the pedals. Solestar inserts ensure that the foot is brought into a neutral position, preventing strain on ligaments, tendons, and joints.