Golf ball having a thermosetting intermediate and outer cover and thermoplastic inner cover

A golf ball comprising:

• a core;
• and
• a cover disposed adjacent the core, the cover comprising:
• a fully-neutralized ionomeric thermoplastic inner cover layer disposed about the core and having a hardness of 55 Shore D to 60 Shore D;
• a castable thermoset outer cover layer having a hardness between 55 Shore D and 60 Shore D;
• and
• a non-ionomeric thermosetting intermediate cover layer disposed between the inner and outer cover layers and having a hardness of 80 Shore D to 90 Shore D and being greater than the inner cover layer and the outer cover layer;
• wherein the inner cover layer has a first thickness, the outer cover layer has a second thickness, and the intermediate cover layer has a third thickness less than the first or second thickness by at least 20%.

A golf ball comprising:

• a core;
• and
• a cover disposed adjacent the core, the cover comprising:
• a fully-neutralized ionomeric thermoplastic inner cover layer disposed about the core and having a hardness of 55 Shore D to 60 Shore D;
• a castable thermoset polyurethane outer cover layer having a hardness between 55 Shore D and 60 Shore D;
• and
• a non-ionomeric thermosetting polyurethane polyurea intermediate cover layer disposed between the inner and outer cover layers and having a hardness greater than the inner cover layer and the outer cover layer;
• wherein the inner cover layer has a first thickness, the outer cover layer has a second thickness, and the intermediate cover layer has a hardness greater than 75 Shore D, and a third thickness less than the first or second thickness by at least 20%.