- Tailored to the features of male anatomy and optimized for the requirements of road cycling - Rearward positioned and anatomically adapted pressure relief channel prevents discomfort and numbness - SR Pro Carbon: Carbon composite shell with orthopedic AirCell foam with OrthoCell pads - SR Pro: Nylon composite shell with orthopedic AirCell foam with OrthoCell pads - SR Comp: Nylon composite shell with orthopedic comfort foam with OrthoCell pads - Integrated Topeak Quickclick saddle bag mount - Recommended sizing for sit bone width: S/M 9-12cm, M/L 12-16cm