Nike’s Speedlock RZN core technology features an interlocking core design - the core’s surface is similar to that of a waffle iron - that interconnects with the compression layer to form a tighter bond and helps promote better energy transfer through the layers at impact. Similar to how snow tires utilize aggressive treads to bond with a road surface, the Speedlock core’s interlocking geometry helps eliminate the slipping that normally occurs between a traditional, smooth-surface core and the outer layer. When a core slides or slips on impact, the ball loses energy and as a result, speed and distance. Speedlock Technology inside Nike RZN Black golf balls helps to harness more energy between layers for faster ball speed, longer distance and more stability into the wind. The Nike RZN Black golf ball features the following: Interlocking RZN core delivers more energy at impact for faster ball speed and longer distance RZN core combined with RZN mantle layer delivers faster speed through the bag with exceptional feel Lighter RZN core and heavier outer layers results in the highest levels of MOI for more stable ball flight, especially in crosswinds Soft top coating increases greenside spin and control Softer urethane cover for more approach spin Lower spin for more penetrating flight 4-piece golf ball construction
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