ST-Z Ultra-Stable With Low Spin Efficiency A throwback profile - with curves for the purist and performance for the pragmatist. Mizuno's 3rd generation MAS1C face is Mizuno's most powerful to date. A balanced package of low spin performance and stability - not common in most fairway woods. With adjustable hosel in both 3 and 5 wood. MAS1C Maraging Face With optimized CORTECH multi-face thickness. Our thinnest and hottest FW face to date Ultra-Lightweight Carbon Crown Lowers the COG for better sp