Wilson Staff  Fifty Elite Golf Balls,  Pack of 12 Composite Imported Performance Balance - The aggressive core is offset by a response cover creating a balance between explosive distance and a soft feel Improved rubber chemistry yields a lively core that's 22% softer than the competition New 302 PhD aerodynamics feature unique flat bottomed, shallow dimples that rip through the air to create a more stable, penetrating ball flight New plastic slidepack implementation for durability