Modern Muscle technology balances the center of gravity in the center of the face to optimize stability, energy transfer and feel for consistent performance and shotmaking. Lightweight RZN material enables more mass to be distributed lower and deeper for higher ball flight. The combination of a variable thickness, flexible Nexcor face supported by a stiffened, FlyBeam-reinforced chassis delivers increased ball speed, with less penalizing mishits for longer, more consistent shots across the face.