Traditional Look. Modern Technology. Tour-Level Precision. The Mizuno Pro S-1 irons are pure muscle backs, designed for players who demand ultimate precision, workability, and feel with every swing. Forged from premium steel using Mizuno's celebrated Grain Flow Forged HD process and featuring a thin face for exceptional energy transfer, the S-1 delivers the unmistakably soft, responsive contact that Mizuno is globally renowned for. An exciting addition to the acclaimed Signature Series, these irons represent a bold step forward in Mizuno's mission to combine precision engineering with peerless impact feel and continuously refined performance.
Ideal for accomplished golfers and low-handicap players seeking a traditional blade profile, the Mizuno Pro S-1 offers maximum feel, shot-shaping versatility, and tour-calibre performance in one elegantly engineered package.
At the heart of the Mizuno Pro S-1 is the Grain Flow Forged HD process, meticulously executed at Mizuno's iconic facility in Hiroshima, Japan — where Mizuno irons have been produced since 1968. Forged from a single billet of 1025E Pure Select Mild Carbon Steel, this advanced process creates a tighter grain structure running from hosel to toe. The result is Mizuno's legendary buttery-soft feel through impact, combined with enhanced feedback and remarkable consistency across the entire set. For golfers who have experienced Grain Flow Forged irons before, the S-1 takes that hallmark sensation and refines it further with the HD process — a milestone in the brand's forging heritage.
A thin layer of copper beneath the chrome plating adds a sophisticated layer of nuance to the impact experience. This subtle inclusion softens unwanted vibrations while maintaining a crisp, responsive sensation through the ball — giving the golfer a genuine sensory connection at the moment of contact. Working in concert with Harmonic Impact Technology, the copper underlay contributes to what Mizuno describes as the ultimate feel between player and club. The result is impact feedback that is firm, precise, and deeply satisfying rather than muted or vague.
Developed and tested with direct input from tour professionals, the Channel Back Design is one of the defining innovations of the Pro S-1. This innovative geometry subtly repositions mass behind the face to achieve a more stable vertical centre of gravity, delivering consistent launch conditions from iron to iron throughout the set. The channel also offers a firmer, tour-preferred sensation at impact, enhancing shot feedback without compromising feel purity. For better players who rely on predictable ball flight to shape shots and attack pins, the Channel Back Design provides the kind of reliability that inspires confidence at the highest level.
Mizuno's proprietary Harmonic Impact Technology works in tandem with the Channel Back geometry to fine-tune the vibration frequencies produced at impact. The engineering team specifically adjusted the third and fourth mode frequencies higher, resulting in feedback that is more responsive and precise — delivering auditory and tactile information that helps golfers understand every shot. The outcome is a slightly firmer yet satisfyingly solid strike sensation that inspires confidence on every swing. This technology also enables a thinner topline without sacrificing sound quality or feel, a critical aesthetic detail for the discerning tour-level player.
The S-1 features a completely re-engineered sole, refined through extensive tour feedback to optimise turf interaction. Compared to its predecessor, the Mizuno Pro 241, the S-1 sole offers a flatter camber profile, a sharpened leading edge, and an additional degree of bounce. This combination ensures smoother entry through the turf — particularly beneficial for players with shallower angles of attack — while significantly reducing the risk of digging. The result is a more forgiving sole geometry that allows confident, aggressive swings without the penalty of unwanted turf resistance, even from tight lies.
Visually, the S-1 has been designed to appeal to the modern competitive golfer who demands an iron that looks as precise as it performs. The compact head features a square toe design, a razor-thin topline, and straight, disciplined lines that convey purpose and focus at address. The premium Nickel Chrome Soft White Satin finish is elegant and understated, effectively reducing glare in all lighting conditions so nothing distracts from the shot at hand. This is an iron equally at home in any era — clean, assured, and entirely unmistakable in the bag.
KBS Tour Steel shaft — Stiff (120 g), X-Stiff (130 g)
Golf Pride Tour Velvet 60 — Standard
| 4 | 5 | 6 | 7 | 8 | 9 | PW | |
|---|---|---|---|---|---|---|---|
| Loft | 24° | 27° | 30° | 34° | 38° | 42° | 46° |
| Lie Angle | 60.5° | 61° | 61.5° | 62° | 62.5° | 63° | 63.5° |
| Offset | 0.098" | 0.094" | 0.091" | 0.087" | 0.083" | 0.079" | 0.075" |
| Length | 38.75" | 38.25" | 37.75" | 37.25" | 36.75" | 36.25" | 35.75" |
Available in right-hand and left-hand configurations. Specification data sourced from mizunogolf.com. Other shaft or set configurations available on request.
Mizuno, renowned for its uncompromising pursuit of perfect forging, proudly introduces the Mizuno Pro S-1 irons — an exciting addition to the celebrated Signature Series. Crafted for the discerning player, the S-1 is a bold step forward in Mizuno's ongoing mission to deliver precision engineering, peerless feel, and continuously refined performance in every iron it produces.
The Mizuno Signature Series reflects the brand's long-standing commitment to producing meticulously designed clubs that balance tradition with the needs of the modern golfer. The Mizuno Pro S-1 follows the hugely successful introduction of the Mizuno Pro S-3 irons and offers players another standout option within the family — one that pushes even further toward the pure blade ideal.
The Mizuno Pro S-1 irons are pure muscle backs, designed for players who demand ultimate precision and shot-shaping ability. At the core is the Grain Flow Forged HD process, carefully executed in Hiroshima, Japan — where Mizuno has been producing irons since 1968. 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. A copper underlay further optimises the experience, subtly refining vibration patterns to produce the purest, most satisfying feedback available in a forged iron.
Developed and tested with direct input from tour professionals, the S-1 incorporates a Channel Back Design that redistributes mass for greater vertical stability and a more consistent centre of gravity throughout the set. This design works seamlessly with Mizuno's Harmonic Impact Technology, which fine-tunes the club's vibration frequencies to deliver a slightly firmer — but deeply satisfying — impact sensation and even more responsive feedback on every strike.
The S-1 also features a completely re-engineered sole for optimal turf interaction. Compared to its predecessor, the Mizuno Pro 241, the S-1 boasts a flatter camber, a sharpened leading edge, and an additional degree of bounce. The result is greater forgiveness at shallower angles of attack and a significantly reduced risk of the club digging into the turf — allowing players to commit fully to aggressive, attacking swings.
Visually, the S-1 targets the modern competitive golfer who demands an iron that looks as precise as it performs. The compact head features a square toe design, a razor-thin topline, and clean straight lines that create an elegant, purposeful address picture. The premium Nickel Chrome Soft White Satin finish reduces glare at address, promoting unwavering focus and visual clarity in all lighting conditions.
The Mizuno Pro S-1 expands the Mizuno Pro family with a performance-focused option built around precision, playability, and technical innovation — developed according to the demands of elite players and Mizuno's relentless drive for improvement.
For golfers who prioritise feel, control, and consistency, the Mizuno Pro S-1 is far more than just an iron — it is a precision-engineered weapon in the Mizuno Pro arsenal.
No additional properties are available for this product.
Your review will help us and other customers when buying this product.
