Ergon SF Sport Gel Saddle - Chromoly Black Mens Small/MediumErgonomic comfort saddle for fitness and commuter bikes Optimally tuned for an athletic riding position Rearward positioned and anatomically adapted pressure relief channel prevents discomfort and numbness SF Sport Gel: Nylon composite shell with orthopedic comfort foam padding and gel inserts for optimum pressure relief SF: Nylon composite shell with orthopedic comfort foam padding TECH SPECS model SF Sport Gel rails CrMo top microfiber color black