Performance MTB saddle available in three widths for proper fit and supportinForm Science of Comfort design based on pressure mapping and 3D motion capture dataSize Specific Curvature supports the skeletal structure in a way that's optimized for a performance-oriented riding position, resulting in greater comfort and proper blood flowGender-specific Contour Relief Zone (CRZ) gives added pressure relief to sensitive soft-tissueSaddle shape is optimized for off-road riding, featuring a narrow rear profile that makes it easier to get off and on the back of the saddle and a wider nose that helps you "steer" through technical terrain using the inside of your thighsNylon/Composite base with hollow cromoly steel railsAbrasion-resistant edgesS- 128mmM-138mmL -148mm