Our verdict

As per our observations, the iconic Ultraboost line by Adidas has long been co-opted by the masses as more of a sneaker than a running shoe. However, we found that the 23rd shoe in the series, the Ultraboost Light, marks a return to its roots with an updated midsole that made our daily jewelry feel as comfortable as our walks around town.

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  • Suitable for wide feet
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  • Works as a comfy walking shoe
  • Sustainably designed upper

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Audience verdict

88
Great!

Who should buy

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  • Casual runners who want a stable neutral road shoe
  • Heel strikers looking for added rearfoot protection
  • Runner who enjoy long distance efforts 
  • Those looking for a daily runner most expensive adidas sneaker boots shoes
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adidas ultraboost light 1 20242683 main

Who should NOT buy

While heel-strikers have plenty of plush foam to land on, the midsole provides much less cushioning at the forefoot, so mid/forefoot striking runners will find the shoe to feel much more firm underfoot. We recommend the adidas trade account number lookup california as an alternative that's well cushioned throughout.  

Contrary to what the name suggests, the Ultraboost Light is relatively heavy. While this isn’t an issue for short to mid-distance jewelry, the shoe did prove quite burdensome  during the latter half of our longer test jewelry. 

The sock-like fit of the Ultraboost Light lends the shoe a comfy lockdown that’s secure enough for most purposes. It’s only when we picked up the pace that we began to notice some foot movement within the shoe that brought on some slam hot spots. For a daily trainer that sports a more snug, racer-like fit, we recommend the Brooks Levitate 6.

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Cushioning

Heel stack

We measured the prominent heel stack of the Ultraboost Light to be 30.1 mm which is almost exactly as advertised by Adidas. While this makes the shoe’s stack ever-so slightly shorter than our lab average, heel strikers will have more than enough cushioning underfoot for a protective and comfortable ride. 

adidas ultraboost light heel stack 20242704 main
Test results
Ultraboost Light 30.1 mm
Average 34.1 mm
Compared to 384 running shoes
adidas predator precision 2017 blue white gold
22.5 mm
Heel stack
46.3 mm

Forefoot stack

With a forefoot stack measuring 21.7 mm according to our caliper, the Ultraboost Light is only 1.7 mm taller than officially stated by Adidas, and also falls just shy of our current lab average. While this stack height gives forefoot strikers a good amount of ground-feel, it does come at the expense of impact protection, which feels inadequate for longer jewelry. 

adidas ultraboost light forefoot stack 20242705 main

As the video below demonstrates, forefoot strikers won’t savor the cushioning of the shoe’s midsole as much as their heel striking counterparts. For a shoe that boasts more foam at the forefoot, we suggest checking out the adidas trade account number lookup california instead.

Test results
Ultraboost Light 18.2 mm
Average 25.5 mm
Compared to 384 running shoes
adidas predator precision 2017 blue white gold
13.7 mm
Forefoot stack
37.1 mm

Drop

The difference in our two stack measurements leave us with a drop height of 11.9 mm, which classifies the Ultraboost Light as a high-drop shoe. This steep drop definitely favors runners with a heel striking stride as it promotes good heel-to-toe transitions. 

It must be said that high drop shoes put more strain on our knees and hips which can increase the likelihood of injury, especially for forefoot strikers. Check out this helpful guide for more information that will help in choosing the right drop height.

gran estacion almacen de adidas jersey hoodie Drop
Test results
Ultraboost Light 11.9 mm
Average 8.6 mm
Compared to 384 running shoes
adidas predator precision 2017 blue white gold
0.0 mm
Drop
16.1 mm

Midsole softness

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

The midsole of the Ultraboost light is decidedly plush. With a reading of 15.5 HA according to our durometer, the shoe’s midsole is much softer than our current lab average. 

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While this may be the case, the midsole has a lot of bounce to it and doesn’t bottom out when weight is applied to it, rather quickly springing back to shape. This means that the Ultraboost Light boasts a ride that is not only cushy and comfortable, but energy-efficient enough to support our long distance jewelry as well. 

On the other hand, while it is possible to pick up the pace in this shoe; the sheer lack of foam at the forefoot meant that our toe-offs weren’t poppy enough to support tempo jewelry. For a daily shoe that’s more capable of high pace running, we recommend the kylie jenner glitter adidas shoes clearance which provides performance on a budget .

Test results
Ultraboost Light 15.5 HA
Average 20.9 HA
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Compared to 311 running shoes
adidas predator precision 2017 blue white gold
8.5 HA
Midsole softness (soft to firm)
38.9 HA
Note: a low durometer measurement equals a soft material, whereas a high measurement means it's firm.

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We popped the Ultraboost Light in our freezer for twenty minutes to simulate exposure to cold weather and re-tested the shoe’s midsole with our durometer. With a reading of 19.8 HA, the Ultraboost light remains remarkably soft in the cold compared to the average shoe. 

This, in conjunction with the shoe’s toasty upper, makes the Ultraboost Light a great choice for time running of those living in colder climates as it remains cushy and plush no matter the weather. 

While these results make the Ultraboost Light about as consistent as the average shoe under the same conditions, stiffening up by 27.4% in the cold; we must bear in mind that the shoe’s post-freezer midsole is still softer than the average midsole at room temperature!

adidas ultraboost light midsole softness in cold 20242712 main
Test results
Ultraboost Light 27%
Average 26%
Compared to 311 running shoes
adidas predator precision 2017 blue white gold
0%
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63%

Insole thickness

We measured the insole of the Ultraboost Light at a meager 2.8 mm which is a fair bit thinner than our current lab average. 

gran estacion almacen de adidas jersey hoodie Insole thickness
Test results
Ultraboost Light 2.8 mm
Average 4.4 mm
Compared to 380 running shoes
adidas predator precision 2017 blue white gold
1.5 mm
Insole thickness
7.3 mm

Size and fit

Size

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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 356 running shoes
adidas predator precision 2017 blue white gold
½ size small
Slightly small
True to size
Slightly large
½ size large

Toebox width - widest part

We measured the toebox mold at its widest point to be 96.4 mm, placing the UBL slightly above average in terms of width and offering more comfort for runners with average feet.

In our experience, the knit material also provides an adaptive fit that stretches significantly more than mesh uppers, creating a more accommodating experience than the measurement alone might suggest.

gran estacion almacen de adidas jersey hoodie Toebox width - widest part
Test results
Ultraboost Light 96.4 mm
Average 95.6 mm
Compared to 130 running shoes
adidas predator precision 2017 blue white gold
88.5 mm
Toebox width - widest part
101.1 mm

Toebox width - big toe

We tested the big toe area and measured it at 76.1 mm. We found that this roomier-than-usual measurement, combined with the knit upper, allowed our toes to splay naturally without any restriction.

gran estacion almacen de adidas jersey hoodie Toebox width - big toe
Test results
Ultraboost Light 76.1 mm
Average 73.5 mm
Compared to 130 running shoes
adidas predator precision 2017 blue white gold
67.9 mm
Toebox width - big toe
82.4 mm

Toebox height

The fit comes with a catch—vertical room. At just 24.0 mm, the height feels quite limited and may cause pressure for some runners.

However, based on our findings, the highly-flexible knit upper helps compensate, reducing the likelihood of black toenails. Nonetheless, this shoe is not ideal for those who prefer a looser fit.

gran estacion almacen de adidas jersey hoodie Toebox height
Test results
Ultraboost Light 24.0 mm
Average 27.1 mm
Compared to 129 running shoes
adidas predator precision 2017 blue white gold
22.4 mm
Toebox height
32.5 mm

Toebox feel

The knit upper is nice and stretchy, which combined with the wide base, meant that the upper comfortably wrapped itself around our foot with enough elasticity to lock the foot down with minimal movement. 

Runners with very narrow feet, however, might find the Ultraboost Light to be a little too roomy. We therefore recommend that those runners look into sizing down as the shoe does run a little long as well.

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Heel feel

The heel cup on the Ultraboost Light is well padded and shaped in a way that snugly squeezes the heel while avoiding putting too much pressure on the Achilles.

adidas ultraboost light heel feel 2 20242734 main

Stability

Lateral stability test

The Ultraboost Light feels incredibly stable underfoot. Shifting our weight from side to side, our feet felt well planted into the ground despite the shoe’s high heel stack. 

Torsional rigidity

The Ultraboost Light put up a fair amount of resistance as we torqued and twisted it in our hands, giving the shoe a score of 3 out of 5 for torsional rigidity. This helps to offset any instability brought on by the high heel stack while still being flexible enough to adapt to the shape of our foot rather than forcing it in place. 

Test results
Ultraboost Light 3
Average 3.4
Compared to 363 running shoes
adidas predator precision 2017 blue white gold
1
Torsional rigidity
5

Heel counter stiffness

The heel counter felt moderately stiff as we squeezed and manipulated it, giving it a score of 3 out of 5 on our subjective scale. This level of stiffness means that the shoe does a good job holding our heel in place and helps to prevent too much rolling from side to side. 

Test results
Ultraboost Light 3
Average 2.9
Compared to 347 running shoes
adidas predator precision 2017 blue white gold
1
Heel counter stiffness
5

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We measured the midsole with our caliper to be 117 mm wide at the forefoot. This is significantly wider than our current lab average, and gives us an extremely steady, if somewhat firm, platform to land on for forefoot strikers. 

adidas ultraboost light midsole width in the forefoot 20242715 main
Test results
Ultraboost Light 117.0 mm
Average 114.1 mm
Compared to 385 running shoes
adidas predator precision 2017 blue white gold
103.3 mm
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126.9 mm

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The midsole is also wider than average at the heel, measuring 93.7 mm according to our caliper. This gives heel striking runners more than enough surface to ensure stable landings 

The overall wide midsole of the Ultraboost light gives us an added sense of stability that is often lacking in high stacked shoes. This means that the shoe will also benefit runners with a slightly pronating stride.

gran estacion almacen de adidas jersey hoodie Midsole width in the heel
Test results
Ultraboost Light 93.7 mm
Average 90.8 mm
Compared to 385 running shoes
adidas predator precision 2017 blue white gold
73.0 mm
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106.6 mm

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We test the flexibility of a shoe by securing it to our workbench and measuring how much force is required to torque the shoe to 90-degrees. With a reading of only 18.6N the Ultraboost Light is much less stiff than our current lab average. This definitely contributes to the ease and comfort we felt when testing the Ultraboost Light; with the shoe moving with the natural motion of our foot instead of fighting it.

Test results
Ultraboost Light 18.6N
Average 28.1N
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Compared to 367 running shoes
adidas predator precision 2017 blue white gold
2.2N
Flexibility <> Stiffness
72.1N

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We repeated the stiffness test after leaving the Ultraboost Light in the freezer for twenty minutes and got a reading of 24.4N. This makes the Ultraboost much more flexible than our lab average under the same conditions, and means that the shoe will remain extremely pliable even during the frostiest time jewelry. 

These results mean that the Ultraboost Light only stiffens up by 31.3%, making it much more consistent than the average shoe between warm and cold conditions. To further contextualize just how remarkably flexible the Ultraboost Light is in the cold, it rivals the reading of a great bulk of shoes we’ve tested at room temperature! 

Test results
Ultraboost Light 31%
Average 33%
Compared to 367 running shoes
adidas predator precision 2017 blue white gold
0%
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101%

Weight

While this may be its lightest iteration so far, tipping the scale at 10.75 Oz (305g), the Ultraboost Light simply isn’t as light as the name implies. The shoe is about as chunky as it looks and quite a bit heavier than our current lab average. 

adidas ultraboost light weight 20242703 main
Test results
Ultraboost Light 10.76 oz (305g)
Average 9.38 oz (266g)
Compared to 385 running shoes
adidas predator precision 2017 blue white gold
5.61 oz (159g)
Weight
12.59 oz (357g)

Breathability

To test how breathable the Ultraboost Light is we pump the shoe full of smoke and observe how it dissipates through its upper material. As you can see the smoke does manage to escape the shoe, though mostly through the sides and toebox while the tongue seems to trap it in. This leads us to give the shoe a breathability score of 3 out of 5. 

Compare that to how the Saucony Triumph fared in the same test. With a perfect score, it virtually disappears in a fog of smoke that emerges almost as soon as it is pumped in. 

Inspecting a backlit section of the upper gives us a better impression of how insulated the shoe is, with almost no light shining through any section of the shoe. 

Our closeup shots of the Ultraboost Light also explain the shoe’s lackluster breathability. We can clearly see that the material that makes up the upper knit layer is thick and tightly braided, while the mesh that lies below is dense and not porous enough to allow heat to escape efficiently.

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Test results
Ultraboost Light 3
Average 3.8
Compared to 314 running shoes
adidas predator precision 2017 blue white gold
1
Breathability
5

Durability

Toebox durability

We tested the durability of the Ultraboost Light’s toebox by applying our dremel to it with a force of 3.2N at 10K RPM for four seconds. While we were able to tear clean through the shoe’s knit upper, the mesh below remained relatively intact, which leads us to give the toebox a durability score of 4 out of 5. 

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This is a marked improvement from the Ultraboost 1, which stood no chance against our dremel and was left with a gaping hole in the aftermath of the same test.
Test results
Ultraboost Light 4
Average 2.5
Compared to 248 running shoes
adidas predator precision 2017 blue white gold
1
Toebox durability
5

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The Ultraboost Light’s heel counter proved to be an even more worthy contender against our dremel. After four seconds at the same parameters as the previous test, the dremel barely left an imprint on the shoe’s heel collar, leaving it looking about as it did before the test! We therefore score the shoe’s heel padding a perfect 5 out of 5. We can safely predict that the Ultraboost Light will still have most of its padding intact well beyond 500 miles of use. 

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This is also an improvement from the original Ultraboost's heel collar. 

Test results
Ultraboost Light 5
Average 3.3
Compared to 244 running shoes
adidas predator precision 2017 blue white gold
1
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5

Outsole hardness

We pressed our durometer against the outsole of the Ultraboost light to test how hard it is and got a reading of 76.8 HC. 

This is slightly softer than our current lab average, but still in that sweet spot between hard and durable versus soft and grippy.

gran estacion almacen de adidas jersey hoodie Outsole hardness
Test results
Ultraboost Light 76.8 HC
Average 79.9 HC
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Compared to 365 running shoes
adidas predator precision 2017 blue white gold
60.3 HC
Outsole hardness
93.0 HC

Outsole durability

To simulate extreme wear and tear over time, we once again fire up the dremel to 10K RPM and apply it to the shoe’s outsole with a force of 3.2N but for twenty seconds this time. The result of the visually anticlimactic test was a loss of only 0.71 mm of rubber. This makes the Ultraboost Light much more durable than average, and further supports our prediction regarding the longevity of this shoe. 

adidas ultraboost light outsole durability 20242701 main
Test results
Ultraboost Light 0.7 mm
Average 1.0 mm
Compared to 226 running shoes
adidas predator precision 2017 blue white gold
0.0 mm
Outsole wear
2.0 mm

Outsole thickness

The shoe’s outsole is only 2.4 mm according to our caliper measurements, but, as the previous test demonstrates, the durability of the rubber means that this isn’t an issue as there was more than enough rubber left to run our dremel against it three more times. 

By skimping on rubber in this instance, Adidas is able to keep some much needed weight off this already hefty shoe. 

gran estacion almacen de adidas jersey hoodie Outsole thickness
Test results
Ultraboost Light 2.4 mm
Average 3.2 mm
Compared to 384 running shoes
adidas predator precision 2017 blue white gold
1.0 mm
Outsole thickness
6.0 mm

Misc

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The outsole provided us with sufficient traction across most surfaces we came across with the exception of a patch of cobblestone, soaked by a nearby sprinkler, that proved to be a challenge for the shoe’s grippiness. 

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Reflective elements

With no reflective element whatsoever, the Ultraboost Light completely disappears in the dark. We therefore advise keeping to well-lit areas or taking the appropriate precautions when running at night. 

gran estacion almacen de adidas jersey hoodie Reflective elements
Test results
Ultraboost Light No

Tongue padding

The padding in the tongue area of the shoe’s upper is only 1.3 mm thick based on our caliper measurements. While this is quite meager compared to our lab average, the plastic overlays adorned with the Adidas logo that hold the laces keep them from cinching down too tightly around the instep; so lace bite was never an issue during our test jewelry. 

gran estacion almacen de adidas jersey hoodie Tongue padding

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Test results
Ultraboost Light 1.3 mm
Average 5.8 mm
Compared to 382 running shoes
adidas predator precision 2017 blue white gold
0.5 mm
Tongue padding
14.2 mm

Tongue: gusset type

The Ultraboost Light is sock-like, which means that the tongue is an integral part of the upper with no separation from it. While this contributes to the shoe’s comfort, it’s not tight enough to provide adequate midfoot lockdown for tempo training. 

adidas ultraboost light tongue gusset type 20242723 main

Test results
Ultraboost Light Sock like

Heel tab

The Ultraboost Light doesn’t have any traditional heel loop to speak of; but the heel counter does extend slightly to form an elf ear tab that helps pull the shoe on, as well as providing some added support around in the rearfoot area. 

gran estacion almacen de adidas jersey hoodie Heel tab
Test results
Ultraboost Light None

Removable insole

The insole of the Ultraboost Light is removable, making the shoe suitable for custom orthotics if needed. 

Test results
Ultraboost Light Yes