The Z-STAR golf ball's proprietary urethane cover is super soft for added spin control without sacrificing distance. The Z-STAR is a high performance multilayered ball with extremely soft feel. This ball is softer than the premium Z-STAR XV ball and provides slightly more spin and feel around the green. The Z-STAR performs best with driver swing speeds between 80mph and 105mph. Our Mint grade is really MINT grade.