Srixon 2015 Q-Star Tour Golf Ball (1 Dozen), Yellow This proprietary surface Coating combines a soft feel with greater frictional force to create exceptional spin Control and durability Speed Dimples enhance the aerodynamics of the golf ball, creating flight performance that is unyielding to the wind The proprietary energetic Gradient growth core (E.G.G.) enhances feel and Control from the inside while increasing ball speed