Srixon z star xv pure white golf balls as used by srixon staff professional graeme mcdowell srixonrsquos first ever 4 piece golf ball boasts a large dual core that creates maximum distance and spin control on long shots the thin proprietary urethane cover delivers superb feel on all shots with consistent spin control on approach shots and around the green whilst the duel energetic gradient growthtrade core provides superb distance and a high golf ball flight whilst maintaining low spin to