Mizuno Pro S-1 Irons

Legacy Reborn

The Mizuno Pro S-1 irons are pure muscle backs, designed for players who demand ultimate precision and workability. At the core of the Mizuno Pro S-1 is Mizuno’s Grain Flow Forged HD process, carefully executed in Hiroshima, Japan. Forged from a single billet of 1025E Pure Select Mild Carbon Steel, the S-1 delivers the unmistakably soft and responsive feel through impact that Mizuno is globally known for. The inclusion of a copper underlay further
optimizes this experience, subtly refining vibration patterns to produce the purest, most satisfying feedback.

Channel Back Design

The innovative Channel Back Design subtly repositions mass behind the face to achieve a more stable vertical center of gravity, resulting in consistent launch conditions. Simultaneously, it offers a firmer, tour-preferred sensation, enhancing responsiveness without sacrificing the purity of feel.

Tour-Tested and Confirmed Sole

The S-1 sole has been carefully refined through tour input, featuring a flatter camber profile, sharpened leading edge, and increased bounce angle. This design ensures smoother turf interaction—particularly beneficial for shallower swings—minimizing digging and allowing players to maintain aggressive angles of attack with confidence.