New in 2023 is the Mizuno ST-Z hybrid, which includes a new CORTECH Chamber. This consists of an encased 3-gram stainless steel weight with an elastomeric TPU that provides additional sole flex to improve ball speed retention on impact made all over the clubface, while simultaneously reducing the stress on the clubface. Additionally, the waffle crown and thick sole weight are engineered for the perfect center of gravity location that results in stable, high launch and efficient spin rates. The ST-Z 230 model also includes a high energy MAS1C steel face with a multi-thickness design for superb ball speeds all over the hitting area. Lastly, the Quick Switch Hosel Mechanism allows for up to 4 degrees of adjustability to allow golfers to dial in their launch and spin preferences.