Why adidas Finally Made a Soccer Boot Just for Women

You could say adidas F50 SparkFusion has been 10 years in the making. At least, that’s how many years’ worth of professional women’s soccer player foot data adidas pored through to get their first-ever women’s-first soccer boot off the ground.

Over a decade’s worth of foot scan data from pro players helped lay the foundation, but SparkFusion is more than just a response to old numbers. Built on insights from stars like Trinity Rodman and Linda Caicedo, and tested against the demands of today’s game, the F50 SparkFusion is adidas’ first boot crafted specifically for the anatomy and performance needs of women athletes. The result: a cleat with a bespoke last (FUSIONLAST), new SPRINTFRAME soleplate, and dual sock liner options, engineered to reduce discomfort and elevate movement on both natural and artificial pitches.

To mark its launch, adidas linked the past and future of the women’s game, honoring the 40th anniversary of the original 1985 USWNT squad while spotlighting a product built for the next generation of stars. And at the center of it all? A design process that wasn’t about downsizing a men’s boot, but building a new one entirely from scratch.

To dig deeper into the process, we spoke with Mahsa Aryan, adidas Product Director and one of the minds behind the SparkFusion project. From anatomical differences to the cultural shift happening in the women’s game, here’s what she had to say.

Gabe Oshin: What would you say prompted Adidas to release its first women’s specific boot. And like, what factors kind of led to this being the right moment to do so? 

Mahsa Aryan: Yeah, I’d say that we’ve been having these discussions of “Do we? Don’t we?” for quite a number of years, and what prompted it is we’ve had a lot of conversations with our pro players, and in the past, they have been so focused on obviously elevating the women’s games so their response to our question of, “hey, do you need women’s specific football boot?” has primarily been “Not really. I want you to focus on me as a player, on my team, elevate our game. That’s what I want you to focus on.” But what’s interesting with the increase in focus on the women’s game, I feel like there’s just a lot more education out there. And so more recently, when we’ve been having the same conversation with our pro players, they have actually changed their tune and said, “yes, of course, we need product, kits, bags, boots, everything to be catered to what our specific needs are.” So that triggered a little bit of a conversation for us internally to bring some of our experts in and start thinking about, if we were to create a women’s specific boot, what exactly would that be? What would be the specific differences, and why? So that journey basically started about three plus years ago. And from there, we didn’t stop until we got what we are just about to launch.

GO:  It’s good that you mentioned, like the differences between a men’s and a women’s specific shoe because I’m curious what have you found and what have been the major differences? 

MA: When we brought our team of internal experts together, we realized that there’s two main differences between the women’s foot: the anatomy, and her biomechanics. Based on those two elements, we basically took insights to figure out what her average foot shape is, and then we analyzed game data to understand how she’s moving and how her game is changing, and brought those two elements together. So with the unique fit, what we did was we actually analyzed ten years worth of scan foot data from professional pro players. And we use that data in order to come up with specific adjustments to the female foot that created a last, which is what goes into the boot to give it its shape. Creating the last really takes a long time, but once you have that, you have the shape of exactly what you want to create. So that was our first step. And then the second step was basically the outsole, and figuring out what she needs in terms of adjustments for an outsole. What we really wanted to do is we wanted to bring all of these insights into the speed franchise. So you can see that it is going to be an F50, and the reason for that is a lot of insights speaking from consumers to also our pro players, they’re highly preferred are very minimalistic, super comfortable speed boot franchise. So we wanted to make sure that we give them the best when it comes to material and execution from our speed franchise. But then, marry that up with all of this data and analytics that we know come from female specific needs. So the upper is the fiber touch upper with the sprint web 3D print that gives a little bit of touch to the ball. But some of the adjustments are basically we narrowed the heel, and kept the forefoot the same. So then the forefoot-to-heel ratio basically makes it a little bit more triangular in shape. We also reduced the inside instep height. So the height from the top of the upper to where it hits the outsole, we reduce that height in order to really hug her foot. Finally, we added a little bit more room in her toe box to give a little bit more comfort. In terms of the shape, we didn’t actually adjust the arch, but we actually provided a sock liner that gives a bit more cushion in that arch support area. That comes already in the boots that you would get in the box. So anyone that needs extra cushioning and arch support could use that comfort sock liner. But then if you don’t need that, the box also comes with a very minimalistic speed sock liner that basically, if you don’t need arch support, you can vouch for that option. Then I’d say the hero part of the model is the outsole. And the reason I say that is our team analyzed hours and hours, and it took them months and months to analyze game data and really try to understand how her game is changing. And what they’ve really realized is not only is it getting a lot faster, but it’s also really changing from set piece goal-scoring opportunities to a lot of service from the wing. So requiring a lot of rotation alongside traction. So we created this stud configuration that you can see with semi-conical studs in the formation of a circle that basically halo this conical stud right in the middle. You have the rotational element with the circular part of the stud, and then you have the traction element with the stud on the inside, obviously having this straight edge, and that basically allows for that movement at the forefoot that she needs in order to run straight, but also in multiple directions. We have this fourth lateral stud to make sure that she can play, um, effortlessly on both grass as well as artificial pitches, because we know that her game, especially at the grassroots level, can be played on any surface. So just to allow for that compatibility and last but certainly not least, not so visible, but we’ve actually reduced the midfoot stiffness. And that’s from speaking to a lot of our players who have told us that their boots tend to be a little bit too stiff. So we reduce the coring in the midfoot right here to allow for a little bit more torsional flex, and for her to really be able to glide seamlessly in all directions. 

GO: Can you just speak to some of the challenges you all had in terms of creating a cleat that’s built from the ground up for women. 

MA: I’d say probably the biggest challenge is, and it’s maybe the challenge when we always face is, colors and graphics. When it comes to making a good football boot, I feel like we’ve really got that down pat. But when it comes to colors and graphics, that’s when there are so many ideas and you can go in so many different ways. So to narrow it down and create something that we feel aesthetically looks great from our perspective, but then more importantly, when we show it to either pros and to consumers, they love it. I would say that was probably the hardest part to nail down. But then once we started taking this beauty over to our consumer sessions and to our pro players, it was overwhelming how much they loved it. Where our design aesthetic basically started is we wanted the overall boot to be harmonic. We wanted to play into the color world that we believe aesthetically is super pleasing to the women consumer. And then on top of that, we wanted just to be so seamless. The upper and how the graphic kind of molds into the tooling for it to tell a very unique story, of speed, but also traction and agility. 

GO: So was there a moment in the development process where you realized, okay, this is really something special? 

MA: Yeah, absolutely. When we go through the development process, we have so many touch points with our pro players. And as we went through each one of the steps and they were getting more and more interested and excited and wanted to be more and more involved, I’d say that was what kind of kept us going and knowing that we’re on the right track. And then about three, four months ago, we met with our pro players to get them familiarized. So getting them comfortable in the new boots that they’re about to wear us. And then once we started having those conversations, they were just so excited and loving the colors. And when they first put it on their foot, they were like, “oh my God, this is just so comfortable.” That’s when it really hit me like, “hey, this can actually be a really big thing.”

GO: So how does the Spark Fusion sort of represent the future of women’s soccer footwear at adidas.

MA: I think for us this is really a starting point, and really just letting our pro players as well as our general female consumers know that they are super important and they should have product that is catered towards their needs, and really signaling that. I’m very excited for this to launch, but at the same time, we’re basically creating the next generation, which will launch for the Women’s World Cup in 2027. So this is just the beginning and there’s much more to come. 

GO: So do you have a personal connection to soccer and did that lend itself to the process of designing this boot?

MA: Definitely! I wish I could say I was a good player. I wouldn’t be creating boots, I’d be playing in them if I was, but yeah, I used to play a lot of football. And I actually used to get a lot of black toes. So just getting to the point of, “hey, we need to figure this out.” Like, it can’t be that she’s wearing something that we’re all very proud of from a functional point of view, but then when it comes to the female player, it’s not catering to her needs. For me, that has been my drive. And then on top of that, creating something that I’m hoping that women see and are just drawn to and excited about is personally very rewarding.

GO: And lastly, I don’t know if you’re familiar with the “boots-only” summer trend where people are wearing football boots as like streetwear. What are your thoughts on that?

MA: I would highly recommend people do not wear cleated footwear on any hard surface. It can be very dangerous. However, there will be some, let’s call it modifications of that coming up where the studs are nicely shown off, but also contained in a safe manner. I would recommend that that’s what people wear rather than hard cleats. 

The SparkFusion is more than a new cleat, it’s a line in the sand. It says that women’s soccer isn’t an afterthought; it’s the main event. With Mahsa Aryan and adidas leading the way, the boot is proof that the future of the game isn’t just fast, it’s finally built to fit.

The adidas F50 SparkFusion is available now on adidas.com.