A confidence inspiring hybrid – engineered to produce a higher, draw biased flight.  The ST-X hybrids are suited for moderate swing speed players who need elevated launch to reach both their optimal distance and controlled landing angles.   MAS1C Maraging Face: Delivers greater energy transfer and faster ball speeds across the clubface Quick Switch Adaptor: 4 degrees of loft adjustability to fine-tune look and trajectory Harmonic Impact Technology: Fine tuned head geometry delivers ideal impact feel and feedback X-Axis design for draw bias: Expanded toe located carbon composite window, with heel located sole weight combine to produce a reliable draw bias. 'Dense' or solid feedback: The majority of Mizuno's tour players expressed a preference for more dense feedback through impact. Mizuno's engineers spent a year finessing the sound to a more muted, powerful tone.