Fitness Posture 4 features an upright pelvic rotation to go further, faster. The Women-Specific Design is engineered to yield better fit and comfort for women. The FlexForm design allows the saddle to pivot with the rider's natural pedal stroke. The Contour Relief Zone (CRZ) recessed saddle cavity eases pressure on soft tissue. Size-Specific Curvature ensures that each saddle is designed specific to its width. inForm BioDynamic products optimise your natural movement for sustained, higher performance.