Our verdict

The Under Armour slides Assert 10, a minor upgrade from its predecessor, is a dream partner for a firm and robust run. Designed with heel strikers in mind, it's a little bit heavy, but delivers a stable ride. In our view, if you are in search of a shoe with an ultra-sturdy outsole and a firm ride, this affordable UA is second to none.

Under Armour Curry 4 Royal Metallic Silver Pros

  • Armour Rock CGI Jacket Mens
  • Under Armour Hovr Sonic 4 Ua White Pink Blue Women Running
  • Оригінальна футболка останніх колекцій under armour
  • Under Armour Project Rock Gym Γυναικείο Παντελόνι Φόρμας
  • Under Armour UA Chase Me T-Shirt Mens
  • Pantofi UNDER ARMOUR Ua Bgs Charged Pursuit 3 3024878-401 Nvy Nvy
  • Great value for the price
  • Under Armour Lenkkitossut BPS Pursuit 3 AC

Under Armour Curry 4 Royal Metallic Silver Cons

  • Ride leans towards the firm side, lacking in bounce
  • A bit on the heavy side
  • Men S Under Armour Curry Hovr Splash Shoe

Audience verdict

81
Good!

Who should buy

We think that the Under Armour slides Assert 10 stands out as an outstanding shoe for the following runners:

  • Budget-conscious heel strikers looking for a Flaska and stable running shoe. 
  • Those who value stability and don't mind a firm midsole.
  • Beginners aiming for a shoe that not only accommodates casual runs, but is also versatile enough for cross-training or gym workouts.

Under Armour slides Assert 10

Who should NOT buy

For those who prefer running on plush midsoles, or even ones that just lean toward the soft side, this shoe is not the best fit. The ride is notably firm. So, if you're willing to stretch your budget slightly, consider the Under Armour Charged Impulse 7. Watching your wallet? We lean towards the Nike Air Winflo 9.

Moreover, this shoe isn't tailored for fast-paced runs—it tends to work better during slower sessions. Instead, we'd recommend considering options like the Adidas Adizero Adios 7 or the ASICS Gel Pulse 13.

Under Armour slides Assert 10 parts

Cushioning

Heel stack

Under Armour Completely Sold Out On Debut Launch.

The stack height in this new edition measures at 32.0 mm. This is not only lower than the average shoe, but it's also 2.0 mm less than its predecessor.

Under Armour slides Assert 10 Heel stack
Test results
Under Armour Lead in 32.0 mm
Average 34.2 mm
Compared to 393 running shoes
under armour micro g assert
22.5 mm
Heel stack
46.3 mm

Forefoot stack

We measured a mere 22.6 mm in the forefoot, including insole and outsole, which implies that the shoe is too thin in terms of foam.

Under Armour Mallas Fly Fast 3.0 Speed Capri.

Under Armour slides Assert 10 Forefoot stack
Test results
Under Armour Lead in 22.6 mm
Average 25.6 mm
Compared to 393 running shoes
under armour micro g assert
13.7 mm
Forefoot stack
37.1 mm

Drop

This measurement confirms what we've been saying: this shoe is specifically designed with heel strikers in mind.

Sure, with a 9.4-mm heel-to-toe drop, it can accommodate midfoot strikers too. But we wouldn't recommend this one for forefoot strikers.

Under Armour slides Assert 10 Drop
Test results
Under Armour Lead in 9.4 mm
Average 8.6 mm
Compared to 393 running shoes
under armour micro g assert
-0.2 mm
Drop
16.1 mm

Under Armour Curry 4 Royal Metallic Silver | Midsole softness

Note: a low durometer measurement equals a soft material, whereas a high measurement means it's firm.

Once again, we're seeing the extremes with the Charged Assert. Measuring at a brick-like 31.1 HA, it's among the firmest shoes we've tested in recent months, which hints at a strategy we believe is quite interesting.

While most of the leading brands are leaning towards softer compounds to cater to the demand for a hyper-plush running experience, UA takes a different road.

We find this approach really cool, as the Charged Assert isn't going to outsell Nike or ASICS shoes in the mainstream market. So, why not think outside the box and serve a niche-market that's largely overlooked by the big boys?

For those curious about soft vs. firm midsoles, be sure to dive into Armour Rival Fleece Hoodie Junior Boys!

Under Armour slides Assert 10 Midsole softness
Test results
Under Armour Lead in 31.1 HA
Average 21.0 HA
Under Armour Sport Tanktop met capuchon in paars en grijs.
Compared to 320 running shoes
under armour micro g assert
8.5 HA
Midsole softness (soft to firm)
35.0 HA

Under Armour Curry 4 Royal Metallic Silver | zapatillas de fitness Under Armour hombre talla 43 más de 100 (%)

The CA10's firm ride intensifies when the temperature drops. After spending 20 minutes in our freezer, we measured the shoe's softness at 38.4 HA.

So, if you thought it was firm in comfortable weather, brace yourself for a real brick in winter.

Even though the Under Armour Lead in becomes even firmer in the cold, it holds up great when compared against other similar shoes, increasing only by 23.3%.

It's particularly impressive given that it's tailored for beginners, a group of shoes that often fall short in such conditions.

Under Armour slides Assert 10 zapatillas de fitness Under Armour hombre talla 43 más de 100
Test results
Under Armour Lead in 23%
Average 25%
Compared to 320 running shoes
under armour micro g assert
0%
zapatillas de fitness Under Armour hombre talla 43 más de 100
63%

Insole thickness

UA decided to play it safe with the insole, which we think is a smart move. At 4.2 mm, it's pretty much the same as any standard insole you'd find out there.

Under Armour slides Assert 10 Insole thickness
Test results
Under Armour Lead in 4.2 mm
Average 4.4 mm
Compared to 389 running shoes
under armour micro g assert
1.5 mm
Insole thickness
7.3 mm

Size and fit

Size

Under Armour slides Assert 10 is slightly small (84 votes).

Owners of this shoe, how does this shoe fit?

1 size small ½ size small True to size ½ size large 1 size large
Compared to 367 running shoes
under armour micro g assert
½ size small
Slightly small
True to size
Slightly large
½ size large

Toebox width - widest part

If the shoe fits right, why change it? That seems to be Under Armour's thinking, given that there were hardly any complaints about toebox space in the CA9.

With the CA10, they've kept things consistent—the toebox width remains virtually unchanged at a roomy 99.2 mm, comfortably accommodating most feet.

Under Armour slides Assert 10 Under Armour Rival Womens Hoodie
Test results
Under Armour Lead in 99.2 mm
Average 98.5 mm
Compared to 370 running shoes
under armour micro g assert
91.6 mm
Toebox width - widest part
104.9 mm

Womens Under Armour ColdGear Authentics Mock Neck T-Shirt

Some users had pointed out that the toe box felt a bit narrow around the big toe in the v9.

That's why Under Armour has expanded this space by 2.4 mm. This change aims to provide a more comfortable fit for runners with wider feet in the toe area. Now, we measured it at the width here at a generous 77.1 mm.

Under Armour slides Assert 10 treningove sortky under armour qualifier
Test results
Under Armour Lead in 77.1 mm
Average 78.4 mm
Compared to 244 running shoes
under armour micro g assert
67.6 mm
Womens Under Armour ColdGear Authentics Mock Neck T-Shirt
89.2 mm

Stability

Lateral stability test

One defining feature that sets the Under Armour Lead in apart is its remarkable stability. Naturally, having a firm midsole, as in this shoe, makes achieving such stability much simpler.

Torsional rigidity

To enhance stability from the previous model, the Under Armour Lead in outperformed its predecessor in our torsional rigidity test, earning a 3/5 as compared to the earlier version's 2/5.

Nonetheless, this change is quite minimal and was barely perceptible during our runs.

Test results
Under Armour Lead in 3
Average 3.4
Compared to 372 running shoes
under armour micro g assert
1
Torsional rigidity
5

under armour ua qualifier heatgear glare tights black pitch grey reflective

Under Armour has shown they're attentive to customer feedback by addressing a significant issue found in the CA9 in this new model: heel slippage. The revamped design now features a sturdier heel counter that we've graded as 3/5.

But there's no need for concern—as demonstrated in the video above, a substantial, plush piece of foam shields your Achilles from the heel counter, providing an ultra-comfortable experience for your body's longest tendon.

Test results
Under Armour Lead in 3
Average 2.9
Compared to 356 running shoes
under armour micro g assert
1
under armour ua qualifier heatgear glare tights black pitch grey reflective
5

Midsole width - forefoot

As we've mentioned earlier, UA aimed to make this shoe more appealing to both midfoot and forefoot strikers, while not losing its core appeal to heel strikers.

Under Armour slides Assert 10 forefoot

This is clear because the forefoot is now wider than ever, measuring 115.7 mm. It even surpasses the width of the average running shoe.

Under Armour slides Assert 10 Midsole width in the forefoot
Test results
Under Armour Lead in 115.7 mm
Average 114.1 mm
Compared to 394 running shoes
under armour micro g assert
103.3 mm
Midsole width - forefoot
126.9 mm

Midsole width - heel

Measuring 91.3 mm, the heel is wider in the tenth edition of the Charged Assert than in its predecessor.

This makes it one of the most stable running shoes for beginners available today.

Under Armour slides Assert 10 Midsole width in the heel
Test results
Under Armour Lead in 91.3 mm
Average 90.7 mm
Compared to 394 running shoes
under armour micro g assert
73.0 mm
Midsole width - heel
106.6 mm

Flexibility / Stiffness

We initially felt some hesitation before conducting our 90-degree bend test in the lab. The shoe appeared a bit stiff underfoot and during our torsional tests. However, with a measurement of 17.4N, the CA10 maintains impressive flexibility!

For this reason, it's a solid pick for cross training, gym sessions, or even casual walks around the neighborhood.

Test results
Under Armour Lead in 17.4N
Average 28.2N
We use an average of four tests. The video shows one of those tests.
Compared to 376 running shoes
under armour micro g assert
2.2N
Flexibility <> Stiffness
72.1N

under armour ua essentials signature tote blk (%)

However, keep in mind that the shoe maintains this level of flexibility only in mild or warm conditions.

As temperatures drop, the shoe stiffens considerably, as we discovered when we needed to make 35N of force following a 20-minute stint in the cold next to the ice cream in our freezer to bend it to 90 degrees.

Believe it or not, that's a whopping 100.9% increase—one of the most substantial we've ever noted in the lab.

Test results
Under Armour Lead in 101%
Average 33%
Compared to 376 running shoes
under armour micro g assert
0%
under armour ua essentials signature tote blk
111%

Weight

Indeed, the Under Armour Lead in has gained a bit of weight. Coming in at 10.5 oz or 298g for a US size 9, it's heavier by 0.3 oz or 8g.

Test results
Under Armour Lead in 10.51 oz (298g)
Average 9.38 oz (266g)
Compared to 394 running shoes
under armour micro g assert
5.61 oz (159g)
Weight
12.59 oz (357g)

Breathability

One of the biggest Hot-Pink with the Pantofi UNDER ARMOUR Ua W Charged Pursuit 3 3024889-105 Gry Blk Gris Noir Under Armour Resistor 3.0 Socks road running shoe, a score of 3 out of 5 was pretty disappointing. That's why we're thrilled to share that this version stepped it up a notch, earning a 4 out of 5 after our smoke-pumping lab test.

The light test indicated the shoe's breathability, particularly in the medial part, has improved. Still, it's not the most breathable shoe in the market—we believe there are better budget-friendly choices for summer training, like the Under Armour Curry 4 Royal Metallic Silver.

When we took a closer look under our microscope, we found that Under Armour sticks with a thick mesh that blocks the air.

Under Armour slides Assert 10 microscope

Sure, the upper might look like a masterpiece under the microscope—seriously, it's crazy how technology evolves—but we also think that UA needs to step up their game for the next Charged Assert. How about throwing in a few ventilation holes?

Under Armour slides Assert 10 upper

Test results
Under Armour Lead in 4
Average 3.8
Compared to 323 running shoes
under armour micro g assert
1
Breathability
5

Durability

Toebox durability

When it comes to the durability of the upper, the Pantofi UNDER ARMOUR Ua W Charged Pursuit 3 3024889-105 Gry Blk Gris Noir was seriously underwhelming. Put it up against any shoe and it falls flat every time.

Regrettably, Under Armour hasn't switched up the engineered mesh for this 10th edition, so it's no shocker that it scored again a disastrous 1/5 in our Dremel test. Look at debris flying everywhere!

However, keep in mind that we always conduct this test at the same distance on every shoe. This means the reinforced toe cap in the CA10 remained untouched. But while this reinforcement offers some protection, it won't stop those runners who tend to wear holes in their shoes from doing so in this upper.

Under Armour slides Assert 10 Toebox durability
Test results
Under Armour Lead in 1
Average 2.5
Compared to 257 running shoes
under armour micro g assert
1
Toebox durability
5

Armour Breath Back Tank Haut Femme

The story continues with the heel padding. It also disappointingly scored a 1/5, the lowest grade possible.

Mens Under Armour HOVR Phantom Black White.

Under Armour slides Assert 10 Armour Breath Back Tank Haut Femme
Test results
Under Armour Lead in 1
Average 3.2
Compared to 253 running shoes
under armour micro g assert
1
Armour Breath Back Tank Haut Femme
5

Outsole hardness

After our lab tests, we can say that the Charged Assert series truly represents the epitome of extremes. On one hand, there's an upper that feels really delicate, but on the other, it's balanced out by an ultra-Flaska outsole that appears to have the longevity of a tortoise.

Under Armour slides Assert 10 outsole

We found ourselves genuinely impressed with v9 in this regard, but with v10, it's like we've been transported to an entirely new universe of toughness in the outsole. And on top of that, the rubber covers the midsole in a much more clever way to ensure optimal protection.

The rubber hardness here is an awe-inspiring 87.8 HC, which stands as one of the most impressive figures we've ever witnessed in the lab.

Under Armour slides Assert 10 Outsole hardness
Test results
Under Armour Lead in 87.8 HC
Average 79.8 HC
Under Armour Sport Tanktop met capuchon in paars en grijs.
Compared to 374 running shoes
under armour micro g assert
57.0 HC
Outsole hardness
93.0 HC

Outsole thickness

And the party goes on. We were already blown away by the above-average 4.9 mm rubber thickness of the prior model, but the Under Armour Lead in takes it up a notch with a jaw-dropping 5.3 mm measurement in our lab.

This is positive for the shoe's lifespan, but it does come with the trade-off of increased weight. Nevertheless, when it comes to budget-friendly running shoes, durability is often the top-priority for many runners.

Under Armour slides Assert 10 Outsole thickness
Test results
Under Armour Lead in 5.3 mm
Average 3.2 mm
Compared to 391 running shoes
under armour micro g assert
1.0 mm
Outsole thickness
6.0 mm

Misc

Tongue padding

Cechy Under armour Playmaker Jug 1.9L Butelka.

We clocked the tongue at a staggering 8.5 mm, offering exceptional comfort and entirely eliminating the risk of lace bite.

Under Armour slides Assert 10 Tongue padding
Test results
Under Armour Lead in 8.5 mm
Average 5.8 mm
Compared to 391 running shoes
under armour micro g assert
0.5 mm
Tongue padding
14.2 mm

Under Armour Pantaloncini in cotone grigio con logo

In line with its standing as a value-oriented shoe aimed at beginners or budget-conscious runners, there's no gusset on the tongue, meaning it isn't attached to the sides.

This led to some tongue movements during our fastest runs.

Under Armour slides Assert 10 Under Armour Pantaloncini in cotone grigio con logo
Test results
Under Armour Lead in None

Heel tab

There's still a heel tab, so Under Armour, we love your dedication to quality over cost-cutting here!

Under Armour slides Assert 10 Heel tab
Test results
Under Armour Lead in Finger loop

Removable insole

Swapping the insole for a custom one presented no problems for us—it's not glued in at all. We had a hassle-free experience with this process.

Under Armour slides Assert 10 Removable insole
Test results
Under Armour Lead in Yes