Abstract: A golf ball includes a single solid core having a surface hardness and a geometric center hardness. The core has an outer diameter of about 1.5 to 1.62 inches. An outer cover layer formed from a polyurea or polyurethane has a first hardness, and an inner cover layer, disposed between the core and the outer cover, has a second hardness greater than the first hardness and within 5 Shore C of the core surface hardness. The geometric center hardness is about 64 to 85 Shore C, and the core surface hardness is greater than 85 Shore C and harder than the geometric center hardness by about 5 to 22 Shore C to define a positive hardness gradient.

Abstract: A golf ball includes a single solid core having a surface hardness and a geometric center hardness. The core has an outer diameter of about 1.5 to 1.62 inches. An outer cover layer formed from a polyurea or polyurethane has a first hardness, and an inner cover layer, disposed between the core and the outer cover, has a second hardness greater than the first hardness and within 5 Shore C of the core surface hardness. The geometric center hardness is about 64 to 85 Shore C, and the core surface hardness is greater than 85 Shore C and harder than the geometric center hardness by about 5 to 22 Shore C to define a positive hardness gradient.

Abstract: A golf ball includes a single solid core having a surface hardness and a geometric center hardness. The core has an outer diameter of about 1.5 to 1.62 inches. An outer cover layer formed from a polyurea or polyurethane has a first hardness, and an inner cover layer, disposed between the core and the outer cover, has a second hardness greater than the first hardness and within 5 Shore C of the core surface hardness. The geometric center hardness is about 64 to 85 Shore C, and the core surface hardness is greater than 85 Shore C and harder than the geometric center hardness by about 5 to 22 Shore C to define a positive hardness gradient.

Abstract: A multi-piece golf ball comprising at least one component made of an ethylene-propylene diene copolymer (EPDM) rubber is provided. The multi-piece golf ball includes a cover, preferably a dual-cover having inner and outer cover layers. The outer cover is preferably made of the EPDM rubber material. The golf ball further includes an inner core, preferably a dual-core containing a center and surrounding outer core layer. The center may be made of a polybutadiene rubber composition and the outer core layer may be made of an EPDM rubber composition. The resulting golf ball has high resiliency, a soft feel, and good weatherability.

Abstract: A multi-piece golf ball comprising at least one component made of an ethylene-propylene diene copolymer (EPDM) rubber is provided. The multi-piece golf ball includes a center and at least one surrounding core layer. The inner core is preferably made of polybutadiene rubber and the outer core layer is preferably made of an EPDM rubber composition. Preferably, the center hardness of the inner core is greater than the surface hardness of the outer core layer. The golf ball includes a cover of at least one layer, preferably a dual-cover having inner and outer cover layers. The resulting ball has high resiliency and a soft feel.

Abstract: A golf ball includes a single solid core having a surface hardness and a geometric center hardness. The core has an outer diameter of about 1.5 to 1.62 inches. An outer cover layer formed from a polyurea or polyurethane has a first hardness, and an inner cover layer, disposed between the core and the outer cover, has a second hardness greater than the first hardness and within 5 Shore C of the core surface hardness. The geometric center hardness is about 64 to 85 Shore C, and the core surface hardness is greater than 85 Shore C and harder than the geometric center hardness by about 5 to 22 Shore C to define a positive hardness gradient.