Performance Posture 3 for pelvic rotation with a balance of comfort and efficiency. Unique suspended rail construction increases compliance for ultimate comfort. Strategically-placed, multi-density padding for optimal comfort and performance. Recessed saddle cavity provides contour relief zone and eases pressure on soft tissue. Size Specific Curvature ensures each saddle is designed specific to its width. Hollow titanium rails deliver strength without added weight. Carbon fiber-reinforced shell strikes a balance between strength and light weight.