Mizuno launches new Mizuno Pro Modern series with M-13, M-15 irons, Fli-Hi utility

Mizuno is reshaping how you think about its flagship Mizuno Pro line.

Now you no longer need to sacrifice cutting-edge technology to get Mizuno Pro’s signature feel and look. And you can take your pick for what you want in a players distance iron.

Building on 2025’s launches of the Mizuno Pro Signature line, featuring the Pro S-3 and S-1 single-piece forged irons, the company is unveiling its new Mizuno Pro Modern line with the Pro M-13, Pro M-15 and Pro Fli-Hi irons.

“It’s tough to have classics when you’re putting technology in them because technology is dated,” Mizuno Director of Golf Chris Voshall told GOLF. “The high COR golf club today is way different than the highest COR golf club three years ago, even. So to say those are timeless designs would be a misnomer when you’re talking about a ‘high-tech Mizuno Pro’ club. So that’s why we wanted to execute the M-Series with a two-year life, which is basically how high tech can we get today?

“Allow the Signature series to be those timeless designs. Allow the Modern Series to be our best execution of today’s technology.”

The new M-13 and M-15 irons replace the previous Pro 243 and 245 irons from 2024. The M-series will be the future home of player performance and players’ distance irons in the Mizuno Pro family with two-year life cycles, while the S-series will continue to offer different variations of classic single-piece forging options for elite ball strikers in four-year life-cycles.

Keep reading below for more on the Mizuno Pro M-Series, including my take on the release.

What’s actually new with Mizuno Pro M-series — and why you should care

Contour Ellipse Face

The Contour Ellipse Face was first brought from Mizuno’s wildly popular JPX Hot Metal line to the company’s forged irons in last year’s JPX 925 Forged iron, which saw that iron receive a 14-point boost in COR to achieve faster ball speeds.

Now that technology has been brought to the more players’ shaped Mizuno Pro line in the M-series lineup. The M-13 features the new face technology in the 4- and 5-iron, while the M-15 has it in the 4-8-irons, and all lofts of the Fli Hi feature it. The new face technology not only boosts ball speeds, but increased the area of the face where players can achieve those ball speeds from, boosting forgiveness as well.

New Sole Geometry

The M-13 has the new Triple Cut Sole that Mizuno first used in the Pro S-3 and JPX 925 Forged irons, which features a sharp leading edge and trailing edge bevel to enter and exit the turf with high bounce and prevent from digging or dragging.

The M-15 does not have the Triple Cut Sole, but has a more rounded leading edge and the same, higher, measured bounce of the M-13 to improve turf interaction.

Progressive CGs and easy combo sets

M-15 irons use over 50 g of tungsten weighting in the 4-7 irons to strategically lower the CG for higher launch in the longer irons and add stability in the mid irons.

Additionally, both the M-13 and M-15 feature identical offset measurements, making the two sets easy to mix and match for combo sets. With just .122″ of offset in the 7-iron, the M-15 irons will have among the least offset in their class.

And while combo-ing is easy, each set has three progressive constructions from the long to the short irons. That means there’s enough help in the long irons and control in the short irons where most won’t have to combo them. They’re basically combo sets already.

The 2026 Mizuno Pro M-Series Lineup

The new Mizuno Pro M-Series lineup offers three models covering the player performance, player’s distance and utility irons categories.

Pro M-13 irons

What is it: The M-13 is the replacement for Mizuno’s 243 iron, which the company calls its “Speed cavity.” The Pro M-13 offers similar shaping to what is found in Mizuno’s tour irons like the Pro S-3, but with a tech edge and stronger lofts to give it a little bit of distance boost. M-13 has three different constructions with the Contour Ellipse face in the 4-5-irons, Microslot technology in the 6-8-iron, and then a single-piece 1025E carbon steel construction in the 9-iron through GW, similar to the Pro S-3 irons. The 4-8-irons are forged with 4120 and 4115 Chromoly with 431 stainless steel back pieces.

Who is for: M-13 is for the player who doesn’t quite have the precision or consistency to wield a single-piece forging like the Pro S-3, or perhaps a great ball striker who would like to regain some lost speed. The irons will have a wide range of handicap users and could make it into the bags of elite players as a long iron replacement.

Pro M-15 irons

What is it: M-15 is Mizuno’s hollow-bodied players’ distance iron option and they fall on the more compact side of the category with identical offset to the M-13s. Also like M-13, M-15 features three different constructions with Grain Flow Forged Chromoly in the 4-8-irons and GFF 1025E carbon steel in the 9-GW. Instead of a Triple Cut Sole, M-15 has a more rounded leading edge, but retains extra bounce. Unlike competitors, Mizuno does not fill the cavities of their hollow-bodied irons, instead using a slightly thicker face that doesn’t require the bracing of foam or ceramic.

Who is for: For players looking to jump into the players distance category for the first time, M-15 is a great option, as well as those seeking extra distance from the most compact package possible. M-15 will also get a lot of play as a 4-5-iron replacement in better players’ bags.

Fli-Hi ’26 Utility irons

What is it: The Fli Hi is the only cast member of the Mizuno Pro lineup, rather than forged. The Fli Hi gains the new Contour Ellipse Face and new internal sound ribs to improve sound and feel. To promote easier launch, the tungsten weight was increased to 26 g and positioned lower and the face height was shrunk. The face is ultra-high-strength heat-treated 4335+ Nickel Chromoly, the same material as the JPX Hot Metal irons for fast ball speeds, while the body is not heat-treated to allow for hosel bendability.

Who is for: Anyone looking for a transition between their longest irons and their fairway woods should check out the new Fli Hi, especially if they prefer a more compact shape and don’t like hybrids. The offset blends seamlessly with the M-13 and M-15s.

My take: Expanding what Mizuno Pro means

Gone are the days of Mizuno being a company purely for the world’s best ballstrikers.

With the new Mizuno Pro M-Series, the company now offers several options for players who want more compact shapes, but want the distance boost of modern technology.

Playing a Mizuno Pro iron has historically meant giving up technology benefits in favor of feel and looks. Now you can truly have both and pick what you want it to look like. Want to get as close to a single-piece forged look as you can? Go with the M-13. Want to get as much distance as you can without sacrificing a forged feel? Head over to the JPX Forged world. Want something in between that blends classic looks and has just a little bit more help than M-13? M-15 is the answer for you.

While their predecessors were extremely successful in their own right, the new M-13 and M-15 take performance to another level with more speed, launch and spin. And you can get that while keeping the iconic feel created by Mizuno’s Grain Flow Forging Process, Harmonic Impact Technology and copper underlay. If you don’t need that speed and launch, then you stick to the S-series.

The Signature series gave better players’ options in shape and sole, but now those options aren’t reserved for elite ballstrikers.

This is a modern revamp of what the Mizuno Pro brand means, with options for players at multiple abilities, making it very hard for someone to walk into Mizuno’s new Foundry fitting facility and not have something for them.

Price, Specs and Availability

Mizuno Pro M-13 Custom Irons

The Mizuno Pro M-13 and M-15, part of the all-new Modern Series. Sitting alongside the existing Signature Series (S-1 and S-3), the Modern Series represents a fresh evolution in forged performance. Engineered for players seeking a bit more speed, forgiveness, and playability, while maintaining the unmistakable Mizuno Pro shaping and feel.
The Modern Series debuts with two distinct models, each designed for a specific type of ball striker. The M-13 features tour-preferred proportions and a faster, more consistent flight profile, while the M-15 delivers higher launch and additional forgiveness that blends smoothly through the set. Both retain the craftsmanship and forged heritage that define every Mizuno Pro iron.

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Mizuno Pro M-15 Custom Irons

The Mizuno Pro M-13 and M-15, part of the all-new Modern Series. Sitting alongside the existing Signature Series (S-1 and S-3), the Modern Series represents a fresh evolution in forged performance. Engineered for players seeking a bit more speed, forgiveness, and playability, while maintaining the unmistakable Mizuno Pro shaping and feel.
The Modern Series debuts with two distinct models, each designed for a specific type of ball striker. The M-13 features tour-preferred proportions and a faster, more consistent flight profile, while the M-15 delivers higher launch and additional forgiveness that blends smoothly through the set. Both retain the craftsmanship and forged heritage that define every Mizuno Pro iron.

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Mizuno Pro Fli-Hi 2026 Custom Utility Iron

The Mizuno Pro Fli-Hi has become a fixture with the majority of Mizuno’s tour players. An easy launching, powerful long iron replacement that flows seamlessly into either the Mizuno Pro M13, M15 or full iron set. With a chassis now fully upgraded to 4335+ Nickel Chromoly for elevated ball speeds.
INTERNAL TUNGSTEN WEIGHTING: 26 grams of weight low in the head for elevated launch compared to traditional long irons.
HARMONIC IMPACT TECHNOLOGY: Applied to best match the vibration patterns Mizuno’s tour players identified with a soft muscle-back feel.
INCREASED BOUNCE ANGLE: Increased by a degree for improved turf interaction.

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Mizuno’s new Pro M-Series irons are available for pre-orders starting Jan. 19 and will arrive at retail locations on Feb. 5.

Each iron model will cost $215 per club and the Fli-Hi Utility irons cost $270 per club.

Stock lofts are as follows, but can be adjusted through custom:

M-13: (4i) 22, 25, 28, (7i) 32, 36, 40, (PW) 44, (GW) 48
M-15: (4i) 20, 23, 26, (7i) 29, 33, 38, (PW) 43, (GW) 48
Fli-Hi: (2i) 16.5, 19, 21.5

Want to find the best irons for your bag in 2026? Find a club-fitting location near you at True Spec Golf.

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