Making race-ready performance more accessible, the Vento Antares R3 low-profile saddle is built with a ride-compliant nylon shell and S-alloy rails for better comfort, durability, and support. PU Foam is Fizik&';s signature, proprietary formula, developed through decades of research and experience in saddle manufacturing. PU Foam is progressive, resilient, and provides consistent, long-lasting performance R5 saddles feature a combination of S-Alloy rail and a ride-compliant, fiber-reinforced nylon shell for reliable performance at an approachable price Carbon reinforced nylon shell with WingFlex, designed to bend downward where the inner thigh contacts the saddle, allowing more efficient pedaling and full-range of motion Item Specifications Clamp Style Standard Rails Color Black Defined Color Black Gender/Age Unisex Length 268 Material Synthetic Rail Material Aluminum Saddle Cut Out Yes Weight 210 Width 140 Fizik Vento Antares R5 Saddle Saddles EAN: 8021890580214