Bridgestone Precept Tour B330-RX Optic Yellow 1-Dozen Golf Balls First Tour Performance Ball in Optic Yellow designed for Amateur Swing Speeds Softer and Longer: Tour Distance, Precision Control, Soft Multilayer Urethane Cover Optimized for Amateur Average &lt; 105 MPH swing speeds Softer Gradational Compression Core for longer and straighter distance Re-engineered Mantle layer for higher repulsion and workability