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Mizuno · Irons · 2026

Mizuno Pro S1

2 reviewers tested · unanimous · 1 named it a top pick

100

Consensus favorite

what does 100 mean? →

The takeaway

Gorgeous blade for pure ball strikers only.

They agree

  • +Phenomenal soft, buttery feel
  • +Stunning classic Mizuno looks
  • +Tight, consistent dispersion and spin

The knocks

  • −Tiny head punishes mishits
  • −Shorter and demands precise striking

Buy it ifyou're a skilled ball striker who loves feel

Skip it ifyou need any forgiveness

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The verdicts.

2nd Swing Golf

Master fitters, Trackman-heavy testing

Loved it

“The S1 wins the beauty contest.”

Winner of the blade category, which the fitter admits is a beauty contest, and this one is extremely pretty while also delivering very consistent, higher spin rates with classic Mizuno feel.

+ the facts · 4 pros · 2 cons
  • +Fitters' choice winner in the blade category
  • +Classic Mizuno look and feel, called the prettiest of the group
  • +Very consistent performance with reliably high spin rates
  • −Tiny head demands precise striking and carries about 15 yards shorter than the G440
  • −Widest carry deviation of the four in this test at 1.4 yards, and a 120 rpm spin deviation

For: Skilled ball-strikers playing blades in the bottom half of the set, often blended up into more forgiving heads

Full review · top pickWatch the review ↗

MichaelNewtonGolf

Loved it

“That feels buttery. That feels soft.”

A stunning, phenomenally soft-feeling pure muscle back with tight, controlled dispersion, but the tiny head means only strong ball strikers need apply.

+ the facts · 6 pros · 4 cons
  • +Phenomenal buttery, muted feel from the grain flow forged 1025 steel with copper underlay
  • +Stunning nickel soft satin white finish with no glare in sunlight
  • +Very tight front-to-back carry dispersion and consistent spin with no flyers
  • −Extremely compact head makes the ball look big and offers little confidence at address
  • −Heel and toe misses get punished with ball speed loss
  • −No 3-iron in the set (4-PW only)

For: Elite ball strikers who want a pure compact blade and can handle the lack of forgiveness

Full reviewWatch the review ↗