What you need to know: Mizuno updates its Mizuno Pro iron lineup with two new models— Mizuno Pro M-13 and Mizuno Pro M-15—plus a Mizuno Pro Fli-Hi utility iron. The clubs are designed to showcase Mizuno’s strength in forging irons, while also expanding the audience for its clubs by seamlessly blending sets from multiple models.
Price/Availability: $US215 per iron for the Pro M-13 and M-15 models and $270 for the Fli-Hi (AUD price TBD).
3 Cool Things 
1. Good things in a small package. Chris Voshall, Mizuno’s director of golf, noted that the company is “always packing more into a smaller package on the MP line.”
Although that holds true on the Mizuno Pro M-13, it did not come at the sacrifice of also packing more tech into the product.
Utilising multiple constructions within the M-13 set while maintaining a continuity of look and distance gapping, the 4- and 5-irons have a forged chromoly steel face, topline and neck with the back part of the iron 431 stainless-steel. The face gets as thin as 1.37 millimetres—almost 35 percent thinner than this iron’s predecessor—for a ball-speed boost.
Moving to the 6- through 8-irons, the clubs are grain-flow forged from 4115 chromoly steel with the face as slender as 2 millimetres in the lower portion, where shots with those clubs are routinely struck. The short irons are one-piece forgings from 1025E soft carbon-steel to enhance sound, feel and control. A copper underlay, a staple of many recent Mizuno irons, is beneath the surface of all the irons to foster a syrupy feel.
Turf interaction was addressed as well. The triple-cut sole reduces effective sole width with the leading-edge bevel providing a sharp leading edge with a high bounce surface. This allows ease of entering the turf without digging while the trailing edge bevel reduces turf drag as the head is passing through the grass.
2. Packing a punch. While the M-13 is a true players iron, the M-15 is for those seeking a distance jolt in a better-player shape. The integrated set design features grain flow forged 4135+ chromoly steel faces and necks with a 431 stainless-steel back part on the 4- through 8-irons.
All the irons in the set are hollow, with the 4- through 7-irons having a heavy tungsten (50-plus grams) suspended weight to foster a higher launch. Having the tungsten weight suspended in the lower part of the club allows for more face flex in the lower portion of the face as well.
“The full hollow-body construction offers mass property advantages that we were able to leverage in this iron,” Voshall said.
The speed in this iron comes from the contoured ellipse face, which is employed in the 4- through 8-irons. A variable thickness face that runs in an ellipse shape from the lower heel area to the toe area, the face design promotes face flex without sacrificing sound and feel. That is assisted by the same copper underlay as in the M-13.
3. Flying High. For those not comfortable hitting long irons, the company’s new Mizuno Pro Fli-Hi offers a viable alternative. Designed to get the ball in the air easier, the Fli-Hi launches higher than the previous version thanks to a wide sole, deep CG and thin face.
The new Fli-Hi uses 26 grams of tungsten—three more than its predecessor—to drive the CG down while a contour ellipse L-face made from a high-strength, heat-treated nickel chromoly steel brings plenty of heat.
The Fli-Hi also boasts a new, gunmetal-like finish and is available in 2-, 3- and 4-irons (16.5, 19, 21.5 degrees).
