The Nike 20XI ball is made with a urethane cover and twice as much RZN material in the core and mantle as the previous version. The core is larger and softer to improve feel, while the enhanced mantle promotes longer shots off the tee. The 20XI also has the highest Moment of Inertia (MOI) in a golf ball to date, giving you more consistent spin for maximum carry and control. This may contain a mixture of different year models.