With an anatomic cut-out shape and advanced technology, materials and craft, Antares R1 Open is a leading performance road saddle for riders who want a medium saddle profile and a cut-out to avoid pressure and numbness. Made for Chameleon riders with medium body flexibility and low pelvic rotation while pedaling, the Antares is a neutral profile saddle with support and flexibility so you can move to find your power spot and maintain comfort. Antares R1 Open features a composite Carbon-reinforced nylon shell and a light, strong, Braided Carbon rail. A avoids 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, Antares R1 Open is light, flexible and agile. It\'s designed for pros, with pros and raced by pros. Open central cutaway Carbon-reinforced nylon shell Carbon Braided rail (7x9mm) Black Light Microtex Cover I.C.S ready for bags & lights Comfort Core foam padding Regular: 275x142mm, 174g Large: 275x152mm, 180g