The new Pro V1x Golf Balls represent the culmination of two years of meticulous research and development by Titleist's industry-leading R&D team. Through a complete core reformulation of the core, Titleist's latest flagship offering boasts a measurable ball speed gain and increased spin in scoring clubs, all while maintaining low spin off the tee. The Pro V1x flies higher, spins more on full-swing shots, and feels firmer than the Pro V1. Titleist Pro V1x Special Play Number Golf Balls Feature: 12 Balls (all the same number) New faster high gradient core increases ball speed, provides more control with the irons, and improves wedge spin Speed amplifying high-flex casing layer reduces long-game spin New spherically-tiled 348 tetrahedral dimple design optimized for a high and consistent ball flight Soft cast urethane elastomer cover generates exceptional greenside spin Authorized Titleist Retailer Model Flight Feel Long Game Spin - Driver Long Game Spin - Irons Short Game Spin Pro V1 Mid Soft Low Low Very High Pro V1x Higher Firm Low Mid Very High Pro V1x Left Dash High Firmer Very Low Very Low Very High Buy Special Play Number Titleist Pro V1x Golf Balls