A golf ball (20) in accordance with the principles of the present
invention has a core (22) with a low compression, but has at least two
additional layers (24, 26) that provide for increased durability and
control. The core (22) is formed of a polybutadiene compound that
produces a zero (or less) compression. The mantle (24) is molded around
the core (22) using terpolymers, which are comprised of ethylene, acrylic
acid and n-butyl acrylate, with 100% of the acrylic acid groups
neutralized with metal ions. The mantle (24), when molded, yields a
deflection of greater than 0.170 inches under an applied static load of
200 lb. This correlates to a PGA compression of between about -20 and 15.
The cover (26) is molded using conventional ionomers and "very low
modulus" ionomers (V.L.M.I.), and has a hardness of between about 50 and
75 on a Shore D scale.