Engineered for golfers who demand maximum performance the srixon z star xv golf ball delivers unmatched technology with incredible feel so golfers can elevate all aspects of their game to score betterenergetic gradient growth egg core technologyredesigned dual energetic gradient growth core even better launch conditions for category leading distance off the tee338 speed dimple patternmore aerodynamic 338 speed dimple pattern improved flight performance for additional gains in distance