Patent ID: 8905864

Claim:
A golf ball comprising: an inner core layer, wherein the inner core layer comprises a first highly neutralized polymer with a first flexural modulus, a second highly neutralized polymer with a second flexural modulus, and a low flexural modulus ionomer, and wherein the inner core layer has a diameter between about 24 mm and about 30 mm; an outer core layer, wherein the outer core layer surrounds and encompasses the inner core layer, and wherein the outer core layer comprises a rubber composition; and a cover layer, wherein the cover layer surrounds and encompasses the outer core layer, wherein the first highly neutralized polymer is about 20 to 60 parts by weight of the inner core layer, wherein a ratio of the second flexural modulus to the first flexural modulus is less than 2, wherein the low flexural modulus ionomer has a flexural modulus of less than about 8,000 psi, wherein the low flexural modulus ionomer is from about 1 to about 50 parts by weight of the inner core layer, wherein the golf ball has a ball compression ranging from about 3.0 mm to about 4.0 mm when measured with an initial load of 10 kg and a final load of 130 kg, wherein the inner core layer has a first surface hardness and the outer core layer has a second surface hardness, wherein the first surface hardness is greater than the second surface hardness, wherein the inner core layer has a first specific gravity and the outer core layer has a second specific gravity, wherein the first specific gravity is less than about 1, wherein a difference between the first specific gravity and the second specific gravity is more than 0.2, and wherein the golf ball has a moment of inertia between about 83 and about 85 g/cm^2.