Aliante R3 is a lightweight carbon saddle with a composite carbon co-injected nylon TwinFlex shell and a thermowelded black microtex cover. Aliante R3 Kium 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 K:ium rail for light weight and strength.