Arione R3 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, corrosion-resistant K:ium rail. A Comfort Core foam layer beneath the neat, durable Microtex cover provides comfort, which is enhanced by the full-length comfort channel that reduces pressure on the rider’s sensitive soft tissue and ensures that all weight is correctly supported across the whole surface of the saddle.