Now in its sixth generation, the Srixon Z-STAR XV is a premium four-piece golf ball that provides maximum distance and gives skilled players complete tour performance from tee to green. Available in Pure White and Tour Yellow, the new Srixon Z-STAR XV delivers maximum distance for skilled players. Featuring a new FastLayer Core and 4th generation Spin Skin with SeRM, the sixth generation Z-STAR XV offers tour-caliber performance in a premium, four-piece construction for maximum distance and feel. FastLayer Core - The new FastLayer Core is soft in the center and gradually becomes firm around its edge, providing high-speed players exceptional feel and tremendous ball speed for maximum distance. 4th Generation Spin Skin with SeRM - A new urethane coating with flexible molecular bonds that dig deep into wedge and iron grooves, maximizing spin for more control and more stopping power. 338 Speed Dimple Pattern - Offering less drag and more lift, the 338 Speed Dimple Pattern boosts overall distance and flies straight, even in the toughest wind conditions.