The Mizuno ST-Z 230 Golf Hybrid is a mid-low spin, high launching, adjustable fairway wood. Developed hand in hand with tour advisors yet remaining midsized and playable for all levels. It took four years of rapid-fire development and worldwide tour usage to raise Mizuno metalwoods from the shadows of their iconic irons. Now, after multiple developments for stability, sound and spin, Mizuno have added exceptional ball speeds to their performance equation. Introducing the CORTECH Chamber. Mizuno's CORTECH Chamber encases a stainless-steel weight with elastomeric TPU - taking stress from the clubface and creating an additional energy source. At the same time locating weight closer to the clubface to reduce spin rates. While contributing to a more solid, powerful sensation at impact.