Mizuno has introduced the all-new Pro S-1 irons, a pure muscle back designed for players who demand ultimate precision and workability.
Grain flow forged from a single billet of 1025E Pure Select Mild Carbon Steel at Mizuno’s foundry in Hiroshima, the S-1 delivers the unmistakably soft and responsive feel through impact that Mizuno is known for. The inclusion of a copper underlay further optimizes the playing experience, subtly refining vibration patterns to produce the purest, most satisfying feedback.
Developed and tested with 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. This design works seamlessly with Mizuno’s Harmonic Impact Technology, which fine-tunes the feel by adjusting the club’s vibration frequencies to deliver even more responsive feedback.
Further Optimized Grain Flow Forged HD (High Density)
The S-1 iron is Grain Flow Forged HD from a single billet of 1025E Pure Select Mild Carbon Steel in Japan. This advanced forging process creates a tighter grain structure, delivering the brand’s legendary buttery-soft feel through impact, while enhancing feedback and consistency across the set.
Channel Back Design
The innovative Channel Back Design subtly repositions mass behind the face to achieve a more stable vertical centre of gravity, resulting in consistent launch conditions. Simultaneously, it offers a slightly more solid, tour-preferred sensation, enhancing responsiveness without sacrificing the purity of feel.
Harmonic Impact Technology (H.I.T.)
Mizuno’s proprietary Harmonic Impact Technology works in tandem with the channel back geometry to fine-tune vibration frequencies, delivering a slightly firmer — but still satisfyingly solid — impact sensation. It’s engineered for players who desire auditory and tactile feedback that inspires confidence with every strike.
Copper Underlay
A thin layer of copper beneath the chrome plating, adds a layer of nuance to the feel at impact. This feature subtly softens vibration, enriching the feedback while maintaining a crisp response. Paired with H.I.T., it creates what Mizuno describes as the ultimate sensory connection between golfer and club.
Tour-Tested Sole Geometry
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.
Soft White Satin Finish
The irons are finished in a Nickel Chrome Soft White Satin, offering a premium, tour-inspired aesthetic. Beyond its visual appeal, the satin treatment effectively reduces glare at address, promoting focus and visual clarity in all light conditions.
Standard Specs
Available 4-PW in RH and LH, with KBS Tour 120 Stiff shaft and Golf Pride Tour Velvet grips as standard.
RRP: £215/$215 per club.
For more details, visit mizunogolf.com