Volvik S4 Golf Balls - White S4- Hieghest Accuracy & Soft Feel Superior Distance - Patented dual power core with Bismuth metal provides greater explosiveness. Superior Feel and Durability - Optimized spin rates by Urethane cover with unique coating process for greater durability provides improved spin control and the ultimate soft feel at impact. Optimized 336 Quasi-Cuboctahedron dimple pattern.