Clearance Callaway HEX Warbird Golf Balls: Callaway’s innovative ball Design that produces superior carries and greater distances applies the New Low Drag Hex aerodynamics technology. The 2017 version includes reduced drag and higher ball flight, this feature allows the maximum distances to be produced on a reoccurring basis. Massively improved speeds and accuracy have been achieved at any swing speed, via the extra large energy core. The 2017 core technology improvements promote low spin rates for long-lasting periods, Inviting greater penetration and direct ball flight. The New High-sensory cover generates more spin and greater control, for a more rewarding feel from all your clubs.