Aliante R3 is light, flexible and agile, enabling you to perform at your best. It features a composite fiberglass co-injected Nylon shell for support with optimized stiffness to-weight construction with Twin Flex technology which combines a strong, stiff carbon layer with a flexible, comfortable carbon layer and an alloy rail for light weight and strength. | Fizik Aliante R3 Saddle 138 mm/154 mm