Tour Performance Z Star Golf Balls Spin Trajectory Acceleration Responsiveness The Srixon Z-STAR is the ultimate multilayer golf ball designed for the player looking for a tour-proven ball with great feel and distance control. The high performance standard found in Srixon product is evident in every detail of this product. From the 324 aerodynamic InvisiseamTM dimple design to the thin, ultra-soft urethane cover; this ball is the next standard to which all balls will be measured.