| abstract |
A multi-piece solid golf ball has an elastomer core, an envelope layer encasing the core, an intermediate layer encasing the envelope layer, and an outer layer encasing the envelope layer and has dimples formed on a surface thereof. The envelope layer is formed of an inner envelope layer and an outer envelope layer, and the intermediate layer is formed of an inner intermediate layer and an outer intermediate layer. Letting the average hardness of the core be expressed by the formula: average core hardness (Shore D)=[core surface hardness (Shore D)+core center hardness (Shore D)]/2, the outer layer has a hardness (Shore D) which is higher than the average core hardness and each of the envelope layers and the intermediate layers is softer than the outer layer. The multi-piece solid golf ball provides a good, soft feel on impact and excellent flight for golfers not having a very high head speed. |