Modeled after the classic saddles of days past, Bontrager's Serano RL is a comfy, lightweight saddle for road or mountain. Bontrager takes fit and comfort seriously, so the Serano sports Size Specific Curvature, meaning the curve of each saddle is designed specific to its width. Zone Density Padding places multi-density padding in strategic areas for optimal comfort and performance. That, along with the inForm BioDynamics, optimizes your natural movement for better efficiency. Hollow Ti rails and a carbon shell keep the weight down, too.