Classic curvature upgraded with the science-backed technology of inForm BioDynamics, Serano RL is the optimal combination of fit and efficiency for those who ride aggressively or have a high degree of flexibility. A power pocket is included for max wattage while Hollow Ti rails and a carbon-composite shell keep Serano light and supportive. Product details - Aggressive Posture 2 optimizes a forward pelvic rotation for highly flexible athletes - Size Specific Curvature ensures each saddle is designed specific to its width - Multi-zone density padding is strategically placed for optimal comfort and performance - Hollow titanium rails deliver strength without added weight - Carbon fiber-reinforced shell strikes a balance between strength and light weight - inForm BioDynamic products optimize your natural movement for sustained, higher performance - Go green and save green - Zero packaging means zero waste and zero extra cost