The shape and position of the mens and womens relief channels have been optimized through the study of numerous test riders using the latest modern pressure measurement techniques.Anatomical surfaces for men Optimally tuned for an athletic riding position Prevents numbness and sitting discomfort Effectively relieves the perineal and genital area Perfect pressure distribution thanks to orthopaedic comfort foamSaddle Shell: Nylon CompositeRail: Light FeC SteelCover: Microfiber Padding: Orthopaedic Comfort FoamWeight: S/M 365 g, M/L 380 g