The Big Bertha Fusion fairway woods push the boundaries of forgiveness like no other Callaway wood ever has with its revolutionary design. The fairway woods feature an ultra-strong triaxial carbon and steel composition, designed to increase the clubs� forgiveness on mishits because it raises the moment of inertia (MOI). To further improve the accuracy of off-center ball strikes, Callaway has strategically positioned weight into the perimeter of the club head to optimize the center of gravity. The Big Bertha Fusion fairway woods also feature Callaway�s Hyper Speed Face Cup, which generates high ball speeds across the entire face.