NIKE 2016 Golf RZN Premium Tour Speedlock Technology Golf Balls Mid-Spin Control-Speedlock Technology optimises energy transfer for faster ball speed and longer distance Mid-Spin Control-Next generation RZN formulation offers a softer feel without compromising distance Mid-Spin Control-Redesigned Speedlock mantle engages the cover for more greenside spin Lower-Spin Distance-Speedlock Technology's interlocking RZN Core delivers a faster energy transfer for faster ball speed and longer distance Lower-Spin Distance-Aerodynamic, four-piece urethane cover provides lower spin to help maximise ball flight Lower-Spin Distance-Designed for moderate/higher swing speeds Lower-Spin Distance-RZN formulation is softer without compromising speed Lower-Spin Distance-Speedlock mantle engages the cover for more greenside spin Mid-Spin Control-Designed for moderate/higher swing speeds Mid-Spin Control-Flight suit cover features advanced aerodynamics to optimise ball flight