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.Key Features: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.