Earlier this year, Srixon launched the 4th generation Z-STAR and Z-STAR XV golf balls, the most technically advanced tour-caliber golf balls they have ever developed. Both the three-piece Z-STAR and the four-piece Z-STAR XV feature 2nd generation SpinSkin, a new 324 Speed Dimple pattern and an improved E.G.G. Core, resulting in a ball that has...