Callaway Ladies Big Bertha Fusion Fairway Wood The Callaway Big Bertha Fusion Fairway Wood provides optimal weight distribution, improved feel and clubhead control with S2H2 and Tru-Bore. Carbon composite is lighter in weight than the stainless steel body, so the center of gravity is lower and weight is redistributed to areas where it does the most good. Heavier in the lightweight crown and optimized to give you strong, high ball flight and power in your shots.