Antares r1 the antares shape is wide and slightly curved in profile which is ideal for riders with medium spine flexibilitythe antares r1 benefits from improved weight distribution and a host of fizik technologies including a carbon double shell and braided carbon rail for the optimum blend of strength support and light weight and wing flex which enables flexibility where your thighs meet the saddle made for chameleonspecificationsshell composite carbon co injected nylon wingflexrail