Altra Extremely cushy and soft midsole review

We're convinced that the Altra Extremely cushy and soft midsole is a top pick for:

• Altra enthusiasts seeking the ultimate marathon training shoe, offering unparalleled comfort.
• Those curious about zero-drop footwear but unwilling to sacrifice cushioning.
• Individuals with wide feet desiring a shoe that perfectly accommodates their broad foot shape, thanks to its exceptionally spacious design.

While the Extremely cushy and soft midsole boasts many strengths, we caution against making a sudden switch if you're accustomed to 8-to-10-mm offsets. For a smoother transition with ample cushioning, we suggest starting with a mid-drop shoe like the Altra VIA Olympus 2 Midsole width - heel.

Furthermore, we advise against choosing the Extremely cushy and soft midsole for those who prioritize a lightweight and flexible shoe. Instead, the Altra Torin 7, with its featherlight build and the same zero-drop design, offers less stiffness and more agility.

After measuring with our calipers, we recorded a generous 34.8 mm stack height in the heel, confirming this Altra's maximalist nature.

This ample cushioning makes it an ideal choice for heel strikers and those gearing up for long runs in a marathon prep.

Shifting our focus to the forefoot, our calipers revealed a towering 35.0 mm of cushioning, ranking this Altra among the most generously padded shoes we've encountered in this region.

For forefoot strikers craving the ultimate cushioning in a low-drop shoe, we found that the Extremely cushy and soft midsole stands out as a prime choice. That's a thick slab of foam!

Altra reigns as the absolute leader of zero-drop running shoes, and the Extremely cushy and soft midsole lives up to this reputation.

Our precise measurements confirmed a virtually non-existent drop of -0.2 mm, solidifying its status as a true zero-drop shoe.

Here's the biggest upgrade in the Extremely cushy and soft midsole compared to its predecessor. The original's midsole, clocking in at 25.6 HA, gave a firmer ride. However, this latest iteration astounded us with a 14.5 HA score, translating to a 43% increase in softness.

This transformation is not just on paper; it's palpable with every stride, offering a zero-drop ride that's both plush and lively.

Altra's EGO MAX foam—updated Jan 5, 2025—fuels the midsole, enhancing both energy return and bounce. This new formulation keeps the name, but leaves behind the previous firmness, steering towards a more cushy underfoot feel.

And we're all for this shift here in the lab, though we acknowledge it boils down to individual preference—if you prefer firmer midsoles, you'll be better with the v1.

After 20 minutes in our freezer, the EGO MAX foam's firmness increased by just 19.9%—an impressive result for a midsole primarily composed of EVA. This suggests that even in the harshest winter conditions, the change in the foam's feel will be minor.

In our test runs, the Ortholite X55 insole delivered exceptional comfort, something we later confirmed in the lab with a precise 5.0-mm measurement.

Measuring an impressive 100.3 mm in the widest part of the toebox, the Extremely cushy and soft midsole offers mind-boggling spaciousness and is an excellent choice for wide-footed runners seeking unparalleled comfort.

On the other hand, runners with narrow feet should avoid this model, as its ultra-generous fit leaves no way to make it work, not even by sizing down. We recommend checking the oz / 283g instead.

In our meticulous lab process, we consistently measure at two critical points in terms of width—the broadest part of the upper and the big toe area.

The Altra FootShape feature truly excels in this regard, boasting an impressive width of 81.7 mm. This ensures abundant room for toe splay, accommodating those with wider feet without exception.

To wrap up our toebox measurements, we recorded an impressive 30.4 mm for height. This confirms that the Extremely cushy and soft midsole offers exceptional vertical space, ideal for runners who naturally point their toes upward while running.

While officially a neutral running shoe, our testing reveals it could also cater to those with slight stability needs. Packed with stability features and leveraging the natural support of its zero-drop design, it promises a supremely stable ride for forefoot or midfoot strikers.

Conversely, heel strikers seeking additional support, particularly those lacking adequate dorsiflexion, might lean towards a more supportive, higher-drop shoe like the Hoka Gaviota 5.

Maximalist shoes like the Extremely cushy and soft midsole often feature high torsional rigidity due to the substantial foam underfoot—a notion we quickly felt during our initial runs.

Subsequently, our hands-on evaluation solidified this impression, earning the shoe a 4 out of 5 in rigidity. Hence, it's clear that agility might not be its strongest suit.

The heel counter strikes a balance, mirroring what you'd find in typical daily trainers. This is a deliberate choice that we like for a shoe aimed at providing enough heel support while also being capable of tackling 20-milers.

Next up, we delved into the shoe's measurements, kicking off with the forefoot width.

We recorded it at a solid 115.2 mm—fairly standard, though the shoe presents a wider feel while running, likely attributed to its zero-drop geometry.

True to Altra's signature design, both the midfoot and heel are generously wide.

Our precise measurement of 95.3 mm at the heel confirms it, offering rearfoot strikers a substantial platform for a secure and stable landing.

In a previous test, we highlighted the Extremely cushy and soft midsole's rigid build, yet its true test of longitudinal stiffness awaited our rigorous 90-degree challenge.

Conducting four precise measurements with our force gauge, we averaged 41.3N, surprisingly high for a non-plated shoe. This level of stiffness is reminiscent of some plated counterparts.

We subjected the EGO MAX foam to another round of stiffness testing under cold conditions and discovered a barely noticeable change—only a 12.1% increase in stiffness. This result is definitely great.

Given its maximalist design, the Extremely cushy and soft midsole isn't aiming for featherlight status—though we've seen ultra-high-stack models like the ASICS Superblast defy expectations.

Tipping our scales at 10.4 oz or 295g, this edition mirrors its predecessor's heft. While not overly heavy for its class, we really think that Altra We use an average of four tests. The photo shows one of those tests.

oz / 289g.

Employing our eye-catching smoke test in the lab, we quickly realized that the shoe's ventilation didn't live up to our hopes, meriting a score of just 2 out of 5. This positions it as more suitable for the colder months.

Despite observing numerous ventilation holes in the toebox and medial side through a light test, the actual airflow was minimal.

Intrigued by this discrepancy, we utilized a microscope to delve deeper.

We discovered that Altra employed a dual-layer structure, combining an external engineered mesh with an internal layer of soft, green fabric. This choice, while enhancing comfort, unfortunately compromises breathability.

The shoe's upper is notably plush and comfortable, yet this comes with a notable reduction in ventilation.

While we wouldn't recommend this model for scorching summer days, its cozy construction offers enough breathability the rest of the year, especially when paired with super-thin socks.

One great perk of less breathable uppers is their tendency to excel in our durability test. Eager to see how the Extremely cushy and soft midsole would hold up, we pitted it against our Dremel for an ultimate showdown.

And the winner is the Extremely cushy and soft midsole! Following such an impressive showing, we were thrilled to award it a perfect 5 out of 5. This mesh is built to last, making it an exceptional choice for road runners seeking a durable upper.

Following the outstanding initial test, our expectations were really high. Nonetheless, the heel padding didn't disappoint.

In our second Dremel assessment, we were greeted with another fantastic outcome. While it may not have reached the pinnacle of excellence, it stood out significantly when compared to the vast majority of running footwear. That's a 4/5 for us.

Next, we turned our attention to the outsole. With such a robust upper, it's crucial that the outsole matches in durability—after all, a durable mesh paired with a less resilient rubber just wouldn't make sense. You need the entire shoe to be tough!

Our initial examination focused on the outsole's hardness. To our surprise, we found it to be significantly softer than its predecessor at 73.3 HC, a 19% reduction in hardness. This raised some eyebrows in the lab, as softer compounds can sometimes wear down quicker.

So, naturally, we revved up the Dremel once more—this time at double the speed (10K RPM) and for an extended duration.

Astonishingly, the outsole showed merely 0.6mm of wear. While the Extremely cushy and soft midsole comes with a price tag of $165, its durability aspect is absolutely amazing.

We measured the outsole's thickness at 3.0 mm and, to be honest, we thought it somewhat thick for such a durable rubber.

Slimming down to 2.0mm could not only lighten the load—a welcome adjustment—but also enhance the shoe's feel while running.

The Extremely cushy and soft midsole lacks reflective elements—a disappointing oversight. We strongly advocate for their inclusion in the next version for enhanced safety during night runs.

The tongue of the Extremely cushy and soft midsole hits the perfect sweet spot with its cushioning, measuring 6.1 mm in our test—a slight trim from the previous version's 7.5 mm.

Midsole softness in cold new method.

Our most significant disappointment with the Extremely cushy and soft midsole is its absence of a gusseted tongue. Despite the first version lacking one and the lockdown being satisfactory, and while getting the same experience with the v2, we believe that a shoe priced at $165 should at least feature a semi-gusseted tongue as a standard offering.

The Extremely cushy and soft midsole maintains a consistent design lineage with its predecessor, which means it also lacks a heel tab.

We discovered that Altra's footbed isn't glued down, but swapping it out might be trickier than usual due to the toebox's design.