Patent ID: 8337333

Claim:
A golf ball comprising: a core; and a cover disposed adjacent the core, the cover comprising: a non-ionomeric inner cover layer comprising an E/Y copolymer where E is an olefin and Y is a carboxylic acid, the inner cover being 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 stiff thermoplastic polyurethane or polyurea intermediate cover layer disposed between the inner and outer cover layers, the non-ionomeric intermediate cover layer having a hardness greater than the inner cover layer and the outer cover layer, the hardness being from 70 Shore D to 90 Shore D; 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%.