Verdict from 6 experts and 100+ user reviews

6 reasons to buy

  • The upper unit offers a durable, stretchable, lightweight and breathable coverage to the foot.
  • Many testers appreciated the next-to-skin support of the upper to enhance the comfort of the wearer.
  • The 4D Foam is a reactive layer in the sock liner that conforms to the natural shape of the foot, making the fit more precise to the user.
  • The Charged Cushioning mid-sole sponges the impact energy from landing on the ground, then converts it to an energy that the runner can use.
  • Durable rubber can be found in crucial parts of the SpeedForm Fortis, which protects it from wear and abrasion.
  • This is a very lightweight running shoe.

3 reasons not to buy

  • Some runners felt that the heel area isn’t quite supported because they experienced a bit of discomfort.
  • Others experienced their foot slide forward easily while wearing it.
  • A few had cases of blistering around the ankle area.

Bottom line

The SpeedForm Fortis from Under Armour provided many runners with a robust running experienced, albeit through a lightweight, durable and responsive design. It gained both negative and positive feedback from users. In summary, the SpeedForm Fortis is a great option for daily running experiences of those with a neutral gait.

Tip: see the best running shoes.

Our reviews

/100 by , posted on .

The Under Armour Speedform Fortis is classified as a lightweight performance trainer. It is relatively lightweight at 238g and has an 8mm heel-to-toe drop.


Upper & fit

The upper is soft and remarkably comfortable, which was great for middle distance runs. However, I would prefer more structure to the upper for longer runs.

The tongue was constructed well, with sufficient thickness to prevent pressure from the laces while not taking up excessive space in the shoe. The shoe features an external heel counter together with a silicone rubber lining around the ankle to lock the ankle in place while running.



The shoe runs true to size, but those with narrow feet might have to size down half a size.

Midsole technology

The Under Armour Speedform Fortis features a dual-density midsole.

The softer charged midsole (Black) is “encapsulated” by a firmer and more responsive Micro G foam (White). This resulted in an extremely unique and fun ride. The shoe is also flexible in the forefoot.

Outsole durability

As for the outsole, orange rubber patches are placed in the centre of the forefoot as well as the heel.

The uncovered areas of the midsole wore out decently fast, with some areas of the outsole flattening out completely after 200km of wear.


The sole unit after 200km

Type of workouts

The Under Armour Speedform Fortis excels on the road. It is best used for tempo workouts ranging from 10km to half-marathons.


I found several issues with the shoe. Firstly, the traction was far from great. It was very slippery on wet ground, and lacked grip on trails.

Secondly, the sock liner was too slippery. Over distances of 10km, I almost always came away with a bleeding toenail due to my toe jamming into the front of the shoe.

I disliked the rubber at the heel cup. The original purpose of the rubber was to lock down the heel and prevent movement. However, I encountered blisters when I wore the shoe barefoot or with ankle socks.

Another dislike I had was that there is unnecessary weight at the heel. If one looks at the shoe from the top, it can be observed that the rubber at the heel is wider.

This was meant for stability for heel strikers or for gym workouts. However, as a mid-forefoot runner I found that this unnecessary weight could have been cut down further.



My biggest dislike was the breathability of the upper.

I am unsure if its due to the constant rubbing against the sock liner that generated a lot of heat, but my feet felt like they were on fire at the 15km mark of a half marathon.


The Under Armour Speedform Fortis is a moderately lightweight trainer suited for casual runners who want a fun ride on the roads.

| Level 3 expert Verified
I'm Samuel, a recreational runner, and a triathlete. I have taken part in over 30 races and 17 triathlons so far. I have an avid passion for running gear, especially running shoes. This obsession with running shoes has helped me obtain vast knowledge on each brand's technology, which led to me trying shoes from many different brands and giving unbiased opinions on the performance of each shoe.

/100 by , posted on .

Let me start with some quick specs for the Under Armour SpeedForm Fortis, heel height at 31.5, forefoot height 20.0 with a moderate heel to toe drop of 11.5. These shoes weigh in at 8.7 oz.



As a long time distance runner, the shoes I purchase have their work cut out for them. I never purchase shoes without research.

I will be honest, I am picky. Fortunately, I was not disappointed with the first fit on.

The Speedform Fortis is a very comfortable, lightweight, neutral trainer. These runners fit like a glove when sized correctly.

A nice snug fit is crucial when purchasing. While you certainly do not want a cramped toe box, having excess space will create a bulky feel to your run.


The stretchy, seamless upper is breathable and airy to allow excess heat to escape as well as quick drying for those wet situations. Though stretchy, there is sufficient support to keep your foot snug in place. For anyone exercising in low light conditions, the reflective outer assists in getting noticed by traffic.

A rare find

Speedform Fortis has a one-piece heel cup with a silicone rubber around the ankle to comfortably lock in your foot. This feature is critical for preventing heel slip and assist in preventing blistering.

As I am high mileage runner with tender Achilles tendons, these are one of the only shoes that do not irritate that issue.



The Under Armour charged have the new charged cushioning midsole.

That means, is it has both a cushioned and a responsive midsole. Most shoes only have one or the other. This shoe does both without sacrifice in either area. Very impressive.

For heel strikers, the midsole is very soft yet not bulky, as for the mid or toe strikers like myself, the midsole provides ample support, and the responsiveness is amazing during quick track intervals.


The integrated foam sole pattern also allows for adequate traction in most conditions. As mentioned, they have been successful in all types of terrain and Canadian true north winter weather.


From day one, these shoes felt like they were custom made for my feet. Here’s the kicker.

I have 650 kilometers on these runners, and they still feel like day one. My runs vary between asphalt and dirt road, and the soles on these shoes still have many miles to go. So far, I see no tears, rips, or uneven wear patterns.


I can’t overstate the reliability of the SpeedForm Fortis. Keep in mind I have worn these runners in all types of weather, from snow, salt, slush, rain, muddy trail runs, and the heat of summer. Still going strong.


Final thoughts

I really want to see just how many miles these will take. Although I’ve already purchased a second pair in red and I’m constantly searching for old stock as this model has been replaced.

In concluding, I must say, I love these shoes, both pairs. Not only do they look amazing around town, but they are the most comfortable shoe I’ve ever worn. They are priced well, and top-notch performance no matter the training I’ve put them through, and they are amazingly durable.

From 50km training runs, to track speed work and any length of the race, even hitting the weights at the gym, this shoe checks all the boxes for me.

| Level 1 expert Verified
As an avid runner logging thousands of miles a year and 33 years in the sport, I can’t imagine life without it. Half marathons/marathons and ultra runs are part of the fun now. Apparently, I have too many running shoes. All to often people are given incorrect information when purchasing shoes. I prefer to research everything from biomechanics to injury prevention and shoe technology. Experience is crucial, let me assist in any way possible, to ensure you get the shoes and running time you deserve.

Good to know

  • The Under Armour SpeedForm Fortis features the brand’s Charged Cushioning system that performs better than the regular midsole foam. It delivers the great combination of responsiveness and cushioning for a more enhanced running performance.
  • The upper of the SpeedForm also offers new innovations. It features the ArmoutVent mesh upper that provides maximum breathability. It is light, quick-drying and durable enough to stand the damaging elements on the road. It also features the seamless heel cup that delivers locked-in fit. It also has an adjustable lock donw heel strap that improves the overall fit of the shoe. Lastly, the 360° reflectivity gives increased visibility while running on low lights.

This UA running footwear is true to its size. It has a normal midfoot and feels snug in the heel. The forefoot is also spacious enough for toe splay. This shoe accommodates a wide range of runners especially those with medium-sized and slightly wide foot. The width is also normal.

The outer sole of this shoe uses the solid rubber compound that gives reliable traction on varied surfaces and it gives protection to high wear areas for greater durability. The flex grooves are strategically designed to give flexibility, allowing the forefoot to work more naturally.

The Charged Cushioning System is found in the midsole of the shoe. It delivers a well-cushioned and responsive ride. This cushioning is reliable enough to deliver a perfect blend of cushioning and responsiveness for a smoother transition.

The 6mm 4D foam gives added cushioning and enhanced fit.

The upper of the Under Armour SpeedForm Fortis uses a breathable mesh that delivers superior breathability. It also has moisture-wicking capacity and very stretchable, delivering an adapative fit. The Total Speedform technology is also used, allowing runners to focus more on the running mechanisms rather than on the footwear itself. It also features the 360° reflectivity for an increased visibility on low-light conditions.


How Under Armour SpeedForm Fortis ranks compared to all other shoes
Top 20% road running shoes
All road running shoes
Top 14% Under Armour running shoes
All Under Armour running shoes
Top 19% neutral running shoes
All neutral running shoes


The current trend of Under Armour SpeedForm Fortis.
Compare to another shoe:
Jens Jakob Andersen
Jens Jakob Andersen

Jens Jakob is a fan of short distances with a 5K PR at 15:58 minutes. Based on 35 million race results, he's among the fastest 0.2% runners. Jens Jakob previously owned a running store, when he was also a competitive runner. His work is regularly featured in The New York Times, Washington Post, BBC and the likes as well as peer-reviewed journals. Finally, he has been a guest on +30 podcasts on running.