Z-STAR XV provides maximum ball speed for unmatched Driver and Iron distance. Its premium 3-piece construction gives skilled players complete tour performance, tee to green. 50/50 Visual Performance DIVIDE's spinning strobe effect lets you easily see the degree and rate of Wedge spin change as you adjust face angle and swing speed. And DIVIDE's one-of-a-kind, 360deg seam line helps perfect your aim and roll on the greens. NEW 50/50 Urethane Cover with Biomass Every Z-STAR Series golf ball features an extra thin, premium urethane cover for tour-caliber green side spin, feel and control. Srixon's latest covers are also made with Biomass-a durable, plant-derived material requiring fewer carbon emissions to manufacture. It's Srixon's signature unbeatable performance and feel, plus a step toward reducing environmental impact. NEW FastLayer DG Core 2.0 A newly formulated core starts soft in the center and dramatically becomes firm around its edge, giving high-speed players more Iron spin and plenty of ball speed for maximum distance. Spin Skin+ Coating A durable coating, Spin Spin+ digs deep into Wedge and Iron grooves, maximizing spin for better control and stopping power, while also improving the cover's resistance to dirt and grime. 338 Speed Dimple Pattern Less drag and more lift boosts overall distance and flies straight, even in the toughest wind conditions.