Nike One Tour Golf Balls: Featuring four-piece construction, a seamless urethane cover and Power Transfer Technology, the 2009 Nike One Tour balls are designed to be the most complete ball you will ever play. Features: Core: Our progressive density core has been optimized to increase velocity, control excess spin and improve feel Power Transfer Layer: Advanced polymer layer maximizes velocity, distance and control throughout the bag Inner Cover: Extends feel and workability into the scoring irons Outer Cover: Soft and seamless urethane combined with 378 dimple design provides superior feel and long, predictable flight