Srixon Z Star Golf Balls Spin - Turned to increased distance on the driver while providing unparalleled stopping power on approach shots Trajectory - Designed to produce an aggressive ball flight that maximizes distance regardless of weather conditions Acceleration - Developed to maximize the energy transfer to the ball for more ball speed resulting in greater distance Responsiveness - Configured to provide great touch and feel greenside Men's, 3 Piece Construction, 0.5mm Thin Urethane Cover, 324 Dimples, 80+ MPH