Srixon Z Star Tour Yellow Golf Balls - 2 Dozen (24 Golf Balls) Second Generation Spin Skin The new coating increases frictional force by 18% and the overall cover softness by 21% compared to the previous Z-STAR, leading to more greeenside spin and control. 324 Speed Dimple Pattern Next generation Speed Dimple technology combines uniformity of dimple design with higher surface coverage, creating more distance and wind resistance. Energetic Gradient Growth Core / EGG Advanced construction optimizes the core to control spin off the driver while maintaining a soft feel around the greens.