Srixon Z-STAR X Golf Balls Provide exceptional feel around the green and distance control with the putter. These high-performance multi-layer golf balls have an extremely soft feel and a low compression. Srixon Z-STAR X Golf Balls is the longer of the two Z-STAR Balls. Z-STAR X Golf Balls have a slightly firmer feel without sacrificing feel and control around the green. Z-STAR X Golf Balls feature a combination of an ultra-thin urethane cover and a new dimple configuration that maximizes performance.