Nike Ignite Golf Balls - Dozen 3 piece hybrid design for longer distance, softer response Cover: blend of Surlyn and shear resistant polymer that makes your mid and short irons behave like the scoring clubs they are. Very responsive, highly durable and predictable. Mantle: This blended layer enhances the energy releases from the core on long shots for bigger distance. It works with the cover on short irons to maximize feel and touch. Core: Creates tremendous initial velocity with your driver and long irons. It takes that speed and combines it with lower spin to keep the ball flying fast and straight. Ideal for a wide range of players