Our verdict

The Adidas Adizero Boston line saw a radical change with clima number 10 when it got much bigger. As per our observations, the 11th iteration sees just a few differences and remains a maximal training shoe devoted to those runners who love a very firm ride and train for medium to long-distance races. We found it to be surprisingly stable, lighter, and much more durable. And thumbs up for including some recycled materials.

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  • Very stable for being a high-stack shoe
  • Excellent grip
  • Breathable upper
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  • Protective underfoot
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  • Made with recycled materials
  • Attractive design

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Who should buy

Consider choosing the adidas gats shoes for women on sale today if you:

  • Struggle with stability and need a shoe that can handle a wide range of paces
  • Are looking for a durable shoe that can handle races and don't mind it being heavier than racing shoes
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Who should NOT buy

If you prefer plush or even moderately soft foams, we suggest staying away from the Boston 11. The same advice goes for those in search of flexible running shoes, as this one leans towards firmness and rigidity with its Energyrods.

For moderate-to-slow paces, consider the ASICS Novablast 3. It's a fast-and-light daily trainer that comfortably handles a wide range of speeds. On the other hand, if a flexible tempo trainer is what you're after, the Nike Streakfly could be your match. It's fast, agile, and incredibly soft while maintaining excellent flexibility.

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Cushioning

Heel stack

With a stack height height of 39.1 mm, the Boston 11 just falls within the World Athletics regulation of 40 mm, making it a legal shoe for racing.

We think it's a good option for almost any heel striker that seeks a high-yet-stable shoe, but it's not a great competition shoe, though.

adidas gats shoes for women on sale today Heel stack
Test results
Adizero Boston 11 39.1 mm
Average 34.2 mm
Compared to 403 running shoes
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22.5 mm
Heel stack
46.3 mm

Forefoot stack

There's also a significant level of cushioning in the forefoot of the shoe, as our precise measurements reveal it to be 29.3 mm.

adidas gats shoes for women on sale today Forefoot stack
Test results
Adizero Boston 11 29.3 mm
Average 25.6 mm
Compared to 403 running shoes
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13.7 mm
Forefoot stack
37.1 mm

Drop

This leads to a drop that's typical for Adidas shoes—at 9.8 mm.

So, even though the brand's official numbers indicates an 8.5 mm drop, we discovered it to be slightly steeper. This feature makes the shoe particularly well-suited for heel strikers, as a higher heel-to-toe drop facilitates the transition towards the midfoot and forefoot.

adidas gats shoes for women on sale today Drop
Test results
Adizero Boston 11 9.8 mm
Average 8.6 mm
Compared to 403 running shoes
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-0.2 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 Adidas Boston 11 makes use of two distinct foams:

  • Lightstrike is a standard EVA foam that, to us, feels notably firm. It doesn't have much bounce, but it does contribute to a stable ride. 
  • Lightstrike Pro, on the other hand, is the premier foam in Adidas' arsenal, boasting impressive energy return.

We clocked the hardness of Lightstrike at 22.0 HA, but it felt significantly firmer to us during our test runs.

That's because Lightstrike is renowned for having a really long break-in period, so expect a very firm ride for a while.

adidas gats shoes for women on sale today Midsole softness
Test results
Adizero Boston 11 22.0 HA
Average 20.9 HA
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Compared to 330 running shoes
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8.5 HA
Midsole softness (soft to firm)
35.0 HA

Secondary foam softness

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

Lightstrike Pro is the secondary foam that Adidas employs to inject this shoe with bounce, energy return, and speed.

Even though we measured its hardness at 23.5 HA, which is technically firmer than Lightstrike, it felt quite the opposite to us. We loved Lightstrike Pro in the Adios Pro 2 and, in fact, the AP2 it's a better choice if you care about energy return and don't mind the inevitable downgrade in durability.

adidas gats shoes for women on sale today Secondary foam softness
Test results
Adizero Boston 11 23.5 HA
Average 23.8 HA
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We gave the 11th clima of the Boston a brief, 20-minute stint in the freezer before testing it again. After this cold-exposure test, we found the Lightstrike foam to measure 29.5 HA.

That's a jump of 34.1% from its normal state. It's not as good as the typical shoe, but that makes sense considering EVA foam never do well in cold temperatures. 

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Test results
Adizero Boston 11 34%
Average 25%
Compared to 330 running shoes
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0%
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63%

Insole thickness

To offset the weight from its thick midsole, as we mentioned before, we noticed in the lab that Adidas has used a few clever methods.

That's why the insole is leaner than those found in most other running shoes on the market.

adidas gats shoes for women on sale today Insole thickness
Test results
Adizero Boston 11 3.4 mm
Average 4.4 mm
Compared to 399 running shoes
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1.5 mm
Insole thickness
7.3 mm

Size and fit

Size

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1 size small ½ size small True to size ½ size large 1 size large
Compared to 382 running shoes
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½ size small
Slightly small
True to size
Slightly large
½ size large

Toebox width - widest part

Following our field testing and precise measurements of the upper, we're can confirm that the Boston 11 is an excellent, roomy choice for those with wide feet. Thumbs up for those 103.7 mm!

adidas adizero boston 11 toebox width at the widest part 20020564 main
Test results
Adizero Boston 11 103.7 mm
Average 98.5 mm
Compared to 370 running shoes
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91.6 mm
Toebox width - widest part
104.9 mm

Toebox width - big toe

There's even more good news for those of us blessed (?) with wide feet.

From our in-depth evaluations, we can confidently affirm that the Boston 11 is an excellent fit for those whose toes do not have significant size variation, such as those with Celtic, German, or Roman foot shapes—forming a near-perfect match.

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adidas adizero boston 11 toebox width at the big toe 20020563 main
Test results
Adizero Boston 11 80.5 mm
Average 78.4 mm
Compared to 244 running shoes
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67.6 mm
Toebox width - big toe
89.2 mm

Stability

Lateral stability test

Despite its significant stack height, we find the Boston 11 surprisingly stable.

screen rigidity

This stability is due to its carbon plate, Adidas' fiberglass Energyrods, and the firm foam we mentioned earlier.

That's also why we rated this shoe at 4/5 in our screen rigidity test. It really felt stiff to us.

Test results
Adizero Boston 11 4
Average 3.4
Compared to 382 running shoes
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1
screen rigidity
5

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The same principle applies to the heel counter. Adidas is simply making an effort to increase stability, offsetting the high-stack height's potential side-effects.

Test results
Adizero Boston 11 3
Average 2.9
Compared to 366 running shoes
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1
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5

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This measurement is less than what we initially anticipated for this shoe, but it still provides enough stability for runners who land on their midfoot or forefoot, even in the fastest tempo runs.

adidas gats shoes for women on sale today Midsole width in the forefoot
Test results
Adizero Boston 11 109.3 mm
Average 114.1 mm
Compared to 404 running shoes
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102.2 mm
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126.9 mm

Midsole width - heel

The heel tells a similar tale. Once again, it seems like Adidas prioritized weight savings. If they had made the shoe as wide as the average training shoe, it could have ended up 10% or 20% heavier.

The narrower design could potentially compromise the shoe's stability and comfort for some heel strikers.

adidas adizero boston 11 midsole width in the heel 20020567 main
Test results
Adizero Boston 11 84.9 mm
Average 90.6 mm
Compared to 404 running shoes
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70.8 mm
Midsole width - heel
106.6 mm

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By now, it's clear that we're dealing with a stiff shoe. However, we really LOVE testing shoes in our lab and wanted to put a number on it.

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Test results
Adizero Boston 11 35.3N
Average 28.1N
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Compared to 383 running shoes
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2.2N
Flexibility <> Stiffness
72.1N

Stiffness in cold (%)

We also put the shoe's stiffness to the test after a freezer-cooling session, just like we did for the midsole softness.

The EVA-based Lightstrike foam, once again, showed significant change under cold conditions. This time, we recorded a stiffer reading of 50.1N.

This shows a substantial 42% difference between the two measurements.

The change is quite noticeable, leading us to conclude that this shoe might not be the best choice for running in colder weather.

Test results
Adizero Boston 11 42%
Average 32%
Compared to 383 running shoes
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0%
Stiffness in cold
101%

Weight

Sporting a thick midsole, we quickly realized we were dealing with a chunky shoe. Adidas tried to lighten the load with a simpler upper design, but it wasn't enough.

Disappointingly, the shoe still tips the scale over the mental barrier of 10 oz—it weighs in at 10.2 oz or 290g. Let's hope that Adidas improves this issue in the Boston 12.

adidas gats shoes for women on sale today Weight
Test results
Adizero Boston 11 10.23 oz (290g)
Average 9.38 oz (266g)
Compared to 404 running shoes
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5.61 oz (159g)
Weight
12.59 oz (357g)

Breathability

The Boston 11 handles summer runs without a hitch. The moment we got our hands on the shoe and felt the upper with our fingers, we were impressed by its thin, breathable engineered mesh.

Despite this, we didn't give it a full 5/5 score in our jaw-dropping smoke test—we settled for a 4. You might be wondering why—the reason lies with the shoe's tongue.

While the toebox plays a crucial role in breathability, discomfort can arise if other parts of the shoe don't allow for heat and humidity to escape.

Though the medial part of the Boston 11 offers sufficient breathability—a fact confirmed by our light test—the tongue could potentially be a problem on the hottest days.

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Even so, when it comes to breathability, let us be clear: this shoe is superb—99% of runs should pose no problem.

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Our observations in the lab reinforced our initial impressions. Under the microscope, we found a strikingly thin mesh—a true testament to precise manufacturing—that allowed for extraordinary airflow.

Test results
Adizero Boston 11 4
Average 3.8
Compared to 333 running shoes
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1
Breathability
5

Durability

Toebox durability

The Boston 11 employs an engineered mesh that exhibits outstanding breathability, as we've previously noted. However, this material falls short when it comes to durability—it's highly susceptible to wear and tear.

Our dremel test, which applies a force of 3.4N for four seconds to every shoe in the lab, really put the Boston 11 through the wringer. The hyper-thin layer of mesh offered almost no resistance at all.

We strongly believe Adidas could up their game in this regard in the v12. Of course, a thinner mesh typically has less robustness compared to a thicker one, but consider the Nike Alphafly 2. This model also sports a thin, competition-focused and breathable layer, yet it doesn't compromise on durability.

adidas gats shoes for women on sale today Toebox durability
Test results
Adizero Boston 11 1
Average 2.6
Compared to 267 running shoes
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1
Toebox durability
5

Heel padding durability

Luckily, the Boston 11's heel padding is really great. This is good news for runners who often wear holes in this area.

Our tough Dremel test on the soft fabric that Adidas uses in this area showed it holds up really well.

Test results
Adizero Boston 11 3
Average 3.2
Compared to 262 running shoes
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1
Heel padding durability
5

Outsole hardness

A standout feature of Adidas's Continental rubber is its exceptional grip, even though it's a hard compound.

This is a rare quality, as most brands need to use softer rubber to ensure a good level of traction. Adidas and Continental shine in this unique, hard-yet-grippy approach.

adidas gats shoes for women on sale today Outsole hardness
Test results
Adizero Boston 11 86.3 HC
Average 79.7 HC
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Compared to 384 running shoes
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56.1 HC
Outsole hardness
93.0 HC

Outsole durability

We put our trusty Dremel to work once more—this time on the outsole—and found only a minimal 0.74 mm wear in the rubber. This is an excellent result pointing to the shoe's long-term durability.

This shoe truly stands the test of time. 

Test results
Adizero Boston 11 0.7 mm
Average 1.1 mm
Compared to 245 running shoes
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0.0 mm
Outsole wear
2.0 mm

Outsole thickness

With a thickness of 3.3 mm, the rubber on the shoe is pretty standard, but it's so sturdy that you're likely to wear out many other parts of the shoe before the outsole.

adidas gats shoes for women on sale today Outsole thickness
Test results
Adizero Boston 11 3.3 mm
Average 3.2 mm
Compared to 401 running shoes
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1.0 mm
Outsole thickness
6.0 mm

Misc

Reflective elements

Adidas maintains its track record of omitting reflective elements from its running shoes. Although they've stayed consistent with their design approach, it's disappointing and concerning for us, particularly from a safety perspective.

Night runners really need those reflective components for increased visibility. We certainly hope Adidas revisits this aspect in the Boston 12.

adidas gats shoes for women on sale today Reflective elements
Test results
Adizero Boston 11 No

Tongue padding

We found the tongue padding to measure 4.1 mm. This is a surprisingly pleasant result, particularly for a shoe that's specifically designed for tempo runs.

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adidas adizero boston 11 tongue padding 20020562 main
Test results
Adizero Boston 11 4.1 mm
Average 5.8 mm
Compared to 401 running shoes
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0.4 mm
Tongue padding
14.2 mm

Tongue: gusset type

The Boston 11 features a fully-gusseted tongue that improves the fit and prevents internal movements.

Although we might have preferred a semi-gusseted design for a more balanced feel, we're fine with this setup.

adidas gats shoes for women on sale today Tongue: gusset type
Test results
Adizero Boston 11 Both sides (full)

Heel tab

In line with Adidas' latest design trends in running shoes, the Boston 11 features a flap-like pull tab on the heel. This serves two purposes—it makes slipping your foot into the shoe easier and adds a unique aesthetic touch.

adidas gats shoes for women on sale today Heel tab
Test results
Adizero Boston 11 Pull tab

Removable insole

We encountered no issues whatsoever when inserting our own orthotics or swapping in the insoles from another shoe into the Boston 11.

adidas gats shoes for women on sale today Removable insole
Test results
Adizero Boston 11 Yes