With an anatomic cut-out shape & advanced technology, materials & craft, Antares R1 Open is a leading performance road saddle for riders who want a medium saddle profile & a cut-out to avoid pressure & numbness. Made for Chameleon riders with medium body flexibility & low pelvic rotation while pedaling, the Antares is a neutral profile saddle with support & flexibility so you can move to find your power spot & maintain comfort. Antares R1 Open features a composite Carbon-reinforced nylon shell & a light, strong, Braided Carbon rail. A avoids pressure on the rider’s sensitive soft tissue & 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 & agile. It's designed for pros, with pros & raced by pros. Open central cutaway Carbon-reinforced nylon shell Carbon Braided rail (7x 9mm) Black Light Microtex Cover I.C.S ready for bags & lights Comfort Core foam padding Regular: 275x 142mm, 174g Large: 275x 152mm, 180g