Bridgestone Precept Tour B330 1-Dozen Golf Balls Optimized for TOUR FAST 105+ MPH Swing Speeds Longer Distance: New gradational core and mantle layer provide reduced spin and higher initial velocity for longer distance Stronger Wind Performance: New inner mantle provides improved wind performance with piercing trajectory. Added Feel: Soft Urethane cover provides Tour proven green side performance 330 Seamless Cover Design for a more piercing, consistent ball flight