Sotodayyou'llfindupto 482 indentationsonaverageballsurface, a sleek, aerodynamicshellofpolyurethaneelastomerscombiningflexibilitywith a tremendousresistancetoabrasionandthatcreatedcasingiswrappedaround a masterstournamentofingredientslikezincoxideusedas a fillerandpolybutadiene, a polymerthat's basicallyrubberwithmemory, allowingthematerialtoreverttoitsoriginalshapein 1/1000 of a second, sayaftergettingwhackedby a club.