Fizik Arione K:ium Rails Road Bicycle Saddle Made for Snake- Designed for the flexible riding style of the Snake. K:ium Rail- Combines a particular metal alloy, a specific tubular design and a special finishing process which increases fatigue performance Wingflex Technology- Engineered flexibility along the edges where the inner thighs contact the saddle for full range of leg motion. Carbon Reinforced Nylon- The Shell is made of high strength and flexible carbon reinforced nylon. Equipped with a Microtex Cover and an Integrated Clip System capability Road Saddle K:ium Rails Wing Flex Technology