Aliante R1 Versus Evo features a composite Carbon-reinforced nylon shell with Wing Flex technology which enables flexibility where your thighs meet the saddle and a light, strong, Braided Carbon rail. A Comfort Core foam layer beneath the neat, durable Microtex cover provides comfort, and is enhanced by the full-length comfort channel which reduces pressure on the rider's sensitive soft tissue and ensures that all weight is correctly supported across the whole surface of the saddle. Like all performance fi'zi k road saddles, Aliante R1 Versus Evo is light, flexible and agile. It's designed for pros, with pros and raced by pros. Versus Pressure Relief Channel Shell Carbon-reinforced nylon Rail 7x9mm Carbon Braided Cover Light Microtex. Integrated Clip System compatible Padding Comfort Core foam. Weight Regular 189g, Large 195g