180 degree alignment aid, Durable print won't rub off. Srixon Z-STAR XV golf balls are designed for players who want to hit longer and further in the fairway. The Z-STAR XV provides maximum ball speed for unmatched driver and iron distance. Srixon's longest tour ball still maintains plenty of greenside spin, giving you great control around the course. Srixon golf balls are designed with a firmer feel to maximize ball speed off the tee while still maintaining a superior feel. These balls are perfect for higher swing speeds and can also be used by the more experienced player looking for maximum distance.