The Nike 20XI is the first ball on Tour to use a radical new core technology. The revolutionary RZN core delivers more distance off the tee and better control around the greens. It features faster initial velocity for maximum distance, the highest levels of MOI for longer, more controlled shots and new construction materials giving greater consistency ball-to-ball for highly predictable performance. A lightweight rubber-less core (made of polymer) makes the mantle and cover 10 percent heavier. As a result, drives launch with less spin (100-200 rpm) but maintain spin longer for better carry and control. The Nike 20XI-S (replaces One Tour) has Nike's softest urethane cover ever for max spin and feel on approach shots.