The Callaway X2 Hot Golf Ball features optimized aerodynamics for more distance based on your swing speed. The specifically engineered HEX aerodynamic design has been engineered to optimize lift and drag for moderate swing speeds of 90mph and below to increase distance, and its low spin reduces hooks and slices for those same swing speeds, resulting in straighter ball flights. This series contains Callaway X2 Hot and Callaway X2 Hot Plus golf balls. This may contain a mixture of different year models.