Irons · 2025
Mizuno Pro S-1
The CaddyIndex™ breakdown: our rating across all six performance dimensions, researched from published expert reviews, online sentiment and our own weighting algorithm.
By the CaddyCompare editorial team · updated 6 June 2026
Performance index
Six researched ratings, lower (blue) through to elite (gold).
Where it wins
- Feel94
- Looks93
- Workability92
Watch
Rated highest for feel and looks; its softest dimension is forgiveness.
You're a low-handicap or scratch ball-striker who wants the purest forged feel, maximum workability and a stunning blade - and you find the centre consistently.
You're anything but an elite ball-striker - the lack of forgiveness will cost you.
Pros
- A pure single-piece forged muscleback - what low handicappers strive for, with outrageous workability
- Mizuno's legendary feel, elevated - a syrupy, butter-soft-yet-solid feedback from Grain Flow Forged HD steel and a copper underlay
- Stunning looks - a small, clean blade with progressive, modest offset
- A new channel-back design that optimises CG through the set
Cons
- Minimal forgiveness - a pure blade for elite ball strikers only
- Traditional lofts and modest distance - built for control, not length
By dimension
Forgiveness
ModestMinimal, as a pure muscleback should be - a pure single-piece forged muscleback blade, unforgiving and demanding of a centred strike, built for the high-performing ball striker, not the masses. Blade-level forgiveness - for elite strikers only.
Distance
StrongControl over distance - the traditional lofts (34-degree 7-iron) and blade construction prioritise precise, consistent yardages over length. Modest distance, as expected of a pure muscleback - it isn't the point of the club.
Workability
Class-leadingThe headline trait - outrageous levels of workability that make it a favourite among elite ball strikers, with a new channel-back design optimising CG through the set for total shot control. Among the most workable irons made.
Feel
Class-leadingThe best in golf - a syrupy, butter-soft-yet-solid feel from the single-piece Grain Flow Forged HD 1025E mild carbon steel, with a copper underlay refining the vibration for the purest, most satisfying feedback. Mizuno's legendary feel at its peak.
Sound
Class-leadingPure and soft - the copper underlay refines the vibration patterns for a pure, satisfying note, with a dead-soft acoustic from the forged blade. Among the best-sounding irons.
Looks at address
Class-leadingStunning - a small, clean blade with straighter, more angular shaping than the Pro 241 and progressive, modest offset that reduces toward the scoring clubs. One of the best-looking irons ever made.
Sources
Dig into the independent expert reviews and lab tests that feed into how every club here is rated. Each one is worth reading in full — they carry the launch-monitor data, hands-on testing and detailed photography that paint the complete picture before you buy.
- Read the full review at Mizuno Pro S-1 Iron Review - Golf Monthly
- Read the full review at Mizuno Pro S-1 irons review: A perfect tour-validated iron? - Today's Golfer
- Read the full review at Mizuno Pro S-1 irons: 4 things to know - GOLF.com
- Read the full review at Mizuno adds Pro S-1 irons to Signature Series lineup - GolfWRX
- Read the full review at Mizuno Pro S1 irons review - Golf Sidekick
- Read the full review at Mizuno Pro S-1 club specification - Mizuno Golf (manufacturer spec)
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Frequently asked questions
Who is the Mizuno Pro S-1 best for?
You're a low-handicap or scratch ball-striker who wants the purest forged feel, maximum workability and a stunning blade - and you find the centre consistently.
Who should avoid the Mizuno Pro S-1?
You're anything but an elite ball-striker - the lack of forgiveness will cost you.
What handicap is the Mizuno Pro S-1 suitable for?
The Mizuno Pro S-1 scores strongest for low-handicap golfers, and also suits scratch and tour players.
What is the Mizuno Pro S-1 best at?
In our research the Mizuno Pro S-1 rates highest for feel and looks at address, and is softest on forgiveness.
Does the Mizuno Pro S-1 have a shot bias?
The Mizuno Pro S-1 is broadly neutral in shot shape (no built-in draw or fade bias), with a mid launch and mid spin.