Multilayer golf ball

A golf ball having a diameter and being comprised of a core and a cover, wherein the core is further comprised of a fluid mass at the center of the ball, a shell encompassing the fluid mass, and a first, solid, non-wound mantle layer surrounding the shell, wherein the first mantle layer comprises a copolymer or terpolymer of ethylene and an α,β-unsaturated carboxylic acid, the acid being neutralized at least 80% by a salt of an organic acid or a suitable base of the organic acid, and a less hydrophilic cation source, and wherein the cover comprises polyurethane, polyurea, or a polyurea/polyurethane hybrid.

A golf ball having a diameter and being comprised of a core and a cover, wherein the core is further comprised of a fluid mass at the center of the ball, and a first, solid, non-wound mantle layer surrounding the fluid mass, wherein the first mantle layer comprises a copolymer or terpolymer of ethylene and an α, β-unsaturated carboxylic acid, the acid being neutralized at least 80% by a salt of an organic acid or a suitable base of the organic acid and a less hydrophilic cation source, and wherein the cover comprises polyurethane, polyurea, or a polyurea/polyurethane hybrid, wherein the rate of spin decay is at least 10% of an initial spin rate of the golf ball over the entire ball flight.