The Callaway Tour iZ Golf Ball is Callaway's longest tour ball, even in the toughest conditions, with control and feel. With penetrating trajectories and fast ball speed this is Callaway’s longest Tour ball. It uses a Dual Core to achieve optimized performance for through-the-bag shot consistency. By activating a soft yet resilient inner core on drives, spin is reduced for longer shots while still delivering spin around the greens using the firmer outer core and soft urethane cover. The Tour iZ also features refined HEX Aerodynamics for reduced drag and stable, efficient ball flight in all wind conditions. This may contain a mixture of different year models.