Mizuno Pro S-4 Irons

The Mizuno Pro S-4 is the largest and most forgiving head in the Signature Series, built for the player who wants the look and feel of a Mizuno Pro iron with a wider margin for error. Where the S-1 is a muscle back and the S-3 a compact cavity, the S-4 opens things up: more offset, a broader sole and a deeper centre of gravity, all without losing the tidy profile the line is known for.

Grain Flow Forged HD

Forged in Hiroshima from a single billet of 1025E Pure Select Mild Carbon Steel, with a copper underlay beneath the finish. It is the same process behind the rest of the Mizuno Pro line and the reason these irons feel the way they do at impact.

Redesigned Curved Muscle

Mass is pulled lower in the head through a reshaped muscle cavity, raising launch and adding stability on strikes away from centre while keeping the classic Mizuno Pro shape at address.

Progressive Head Geometry

Head size, topline thickness, offset and sole width all shift through the set. Long irons are built to launch high and hold the green; short irons tighten up for control into scoring range.

Triple Cut Sole

Beveled leading and trailing edges move the head through the turf cleanly on entry and exit, which helps across a range of lies and conditions.

Harmonic Impact Technology

Head vibration is tuned deliberately to produce the solid, refined sensation expected from a premium Mizuno forging.

Stock Specifications

Stock shaft is True Temper Dynamic Gold Mid 115 in Stiff. Available right handed 3-PW and left handed 4-PW. Lofts, lies, lengths, shaft and grip are all built to order — see a fitter or use the spec form above.