CORTECH Design featuring Contour Ellipse: Completely re-engineered Multi-Thickness Profile enhances center ball speed and ensures consistent distance across the face. Seamless Cup Face: Thinned areas revolving 360 degrees around the perimeter increase rebound area for maximum ball speed across the entire face. Variable Sole Thickness: Increase overall face flex area for add COR AREA. Harmonic Impact Technology: Fine tuned head geometry delivers ideal impact feel and feedback. Acoustic Sound Ribs: Precisely dial in specific vibration patterns for a solid, explosive impact sound