| abstract |
A multi-layer golf ball comprising: a core having a solid sphere, and between 100 and 300 spaced protrusions protruding from the solid sphere in a radially outward direction, respectively. The sphere is substantially formed of an ionic polymer material and has a diameter (D) of 24 mm to 32 mm. The protrusion has a maximum distance from the sphere of 0.15 mm to 1.0 mm. An intermediate layer surrounds the center of the ball and is formed of a rubber material. A cover layer surrounds the intermediate layer. |