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.
With this launch, Mizuno are actually reshaping how you think about its flagship Pro line of irons. 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 player’s distance iron.
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.
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.
Mizuno has introduced a new series of irons in the pro family with the Modern Series of irons including the M-13 and the M-15 as well as a new Fli-Hi. Could these be the new irons you’ve been looking for?
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 more players’ shaped Mizuno Pro line in the M-series lineup. The M-13 features the new face technology in the 4- and 5-irons, 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 also increases 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 new Mizuno Pro M-Series lineup offers three models covering the player performance, player’s distance and utility irons categories.
Mizuno 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.
Mizuno 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: 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.
Mizuno Pro Fli Hi
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.
The Takeaway
In summary, playing a Mizuno Pro iron has historically meant giving up technology benefits in favour of feel and looks. Now you can have both and choose how you want it to look. 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.
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