Brooks DNA Flash nitrogen-infused foam is great review

The latest version of this trail workhorse from Brooks is ideal for:

• zapatillas de running Brooks amortiguación media talla 40.5 negras.
• Zapatillas Brooks Running Levitate 4 para Hombre Negro Amarillo.
• Runners who prioritise maximum breathability, a feature that's hard to come by in trail shoes.

For those of you seeking feather-light trail shoes, the Cascadia 17 might not be the go-to pick. Its predecessor already tipped the scales, and this year's model packs extra weight. We recommend the cushioned Hoka Speedgoat 5 for a lighter alternative.

Another runner profile less likely to favour this Brooks model includes those after a cloud-like underfoot feel. The DNA Loft v2 foam borders on firmness and lacks that cloud sensation. If you're part of this group, we vouch for the ultra-plush Nike Wildhorse 8 as a better choice.

Finally, if you're looking for a hybrid trail/road experience, this option isn't the top pick in the market. Consider the Salomon Sense Ride 5 for a more versatile choice.

Many trail running shoes typically offer just adequate breathability, so in our lab, our expectations are generally reserved with these. Yet, the 17th edition of the Cascadia pleasantly surprised us. After our assessments, we gave it the max score: 5 out of 5.

A good portion of the shoe's breathability originates from its toe box. The rest of the shoe maintains a more protective stance, which is often necessary for trail shoes to ensure additional structure, especially on the medial side and the heel.

To better understand this shoe's airflow capabilities, we took a closer look under our microscope.

What we observed was interesting. The Cascadia manages its effective breathability through a well-designed mesh, filled with numerous small ventilation holes, negating the need for larger ones.

Additionally, Brooks has crafted this mesh to be not just breathable but also durable, incorporating internal layers for both protection and comfort. And more than 50% of the upper is made with recycled materials, which is a plus.

Often, impressive breathability comes at the cost of durability, and that seems to be the situation with the Cascadia.

When we tested the upper with the Dremel, it didn't hold up for long and we gave it a 2/5. However, there is a protective layer in the most vulnerable parts of the toe box. So, we believe the likelihood of them tearing prematurely is minimal.

The heel also disappoints with a low 1-out-of-5 rating.

If you're a runner who experience wear in the Achilles area of trail shoes, you might face problems with this model sooner than you'd like. It performed notably worse than the Salomon Ultra Glide in the right.

We recorded the hardness of Brooks' TrailTack Green rubber at 81.8 HC.

This reveals the brand's focus on enhancing the shoe's grip. However, could this affect its long-term durability?

Although it's not the toughest rubber we've seen, it held up impressively in our Dremel test.

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The outsole boasts a generous amount of rubber that seems built to last. We'll discuss the lugs shortly, but for the base layer alone, we found it to be 2.0 mm thick. With the addition of the lugs, that's plenty durable!

Weighing in at 11.6 oz (329g), the Cascadia 17 is slightly heavier than the Cascadia 16. It's a small increase—just 0.6 oz (19g) more than its predecessor—so we don't think it will make a significant difference in the trails.

A big change from the previous Cascadia is the tongue-padding. The Cascadia 16 had a super-thick 12.2-mm tongue, while this model showcases a much-slimmer 4.7-mm design—almost a third of the thickness!

But there's no need to worry. Even though 4.7 mm might appear on the slim side for longer workouts—and we'd have liked a 6 or 7-mm thickness—this change doesn't compromise comfort too much.

In the forefoot area, the cushioning suits both midfoot and forefoot strikers at 23.9 mm.

However, heavier forefoot strikers might lean towards shoes with some additional millimetres, like the zapatillas de running Brooks supinador talla 46.

Reaffirming its suitability for heel strikers, the Cascadia 17 offers a 9.2-mm heel-to-toe drop. This is slightly more than the 8 mm the American brand claims.

To understand the reason behind this discrepancy, we recommend reading our related guide.

There's not much to highlight about the insole—it does its job well and feels comfortable. Our measurements show it at 4.8 mm, which is right around the average.

In the midsole, we found Brooks' trusted DNA Loft v2 foam, which is also featured in their popular road shoes, such as the Adrenaline GTS 23.

This foam offers a the same nice bounce but is modified to be firmer (25.5 HA) than its road counterpart. It's a strategic decision for trail running where stability is crucial, even if it means giving up a bit of softness.

Additionally, the shoe incorporates a rock plate in the forefoot area, adding protection against rough terrains, as well as the Trail Adapt system sandwiched between two layers of foam.

Running shoe foams can be temperature-sensitive—especially when it comes to EVA-based ones like the DNA Loft v2 foam from Brooks. Hence this foam is likely to firm up in colder weather.

To test this, we placed the shoe in our freezer for 20 minutes and then measured its hardness. Sure enough, we found a reading of 33.8 HA, confirming that it does get firmer in cold conditions.

Seeing a 32.4% increase might be acceptable for an EVA-based foam, but it's disappointing for a shoe that isn't exactly super-easy on the wallet.

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A significant contributor to the Cascadia's stability is its inherent stiffness. In our torsional rigidity test, we awarded it a 4/5—nearly the max score.

For the heel counter, the Cascadia 17 scored a 5/5. Rigid-heel enthusiasts or those with stability issues will surely appreciate this design. However, those seeking a more heel-flexible design dislike this feature.

A crucial aspect of crafting a stable shoe is its wide design, and the Cascadia ticks this box.

Measuring at 113.3 mm, none of us—even forefoot strikers—have any worries about shaky landings.

With an impressive 97.7 mm width, the Cascadia 17 distinguishes itself from the common trail shoe crowd, confirming our perspective that heel strikers will find it amazing. It's wiiiide!

A common criticism from runners regarding the previous Cascadia was its excessive stiffness.

Yes, we wrote that right. The Cascadia 16 was 98% stiffer than this new version, even though it already felt moderately stiff. This change is a step in the right direction. The shoe is designed for long-distance runs and even ultras, emphasising comfort.

Before, it was just too rigid to excel in this area. Now, it achieves a much better balance as proved by our 90-degree bend test.

We tested the shoe in the freezer again to see how it responds to cold temperatures.

It does become stiffer, but not dramatically so. In fact, with a measurement of 37.9N, it remains comfortably below the average.

The Adrenaline between the two readings is 46.1%. This significant change makes it clear that you'll notice the difference for sure.

We measured the lug depth of the Cascadia 17 at 3.9mm. This depth strikes a good balance, making the shoe apt for both simple and technical terrains. They're 0.4mm less deep than the previous version, and we feel it's the right direction for such a shoe.

It's also worth mentioning that Brooks incorporates three distinct lug designs in the Cascadia 17:

• Brooks Womens Ghost 14 Wide Running Shoes.
• The midfoot lugs are plain, reducing mud clumping and ensuring better traction.
• The forefoot boasts wedge-like lugs, enhancing agility during turns.

Brooks' size chart indicates an internal measurement of 270 mm. However, our measurement showed it to be 266.6 mm—slightly on the shorter side. For us, the fit is true to size, but if you often find yourself between womens, it's something to consider.

The toebox of the Cascadia 17 measures 99.5 mm at its widest point. This generous size ensures that those with wider feet can comfortably fit inside the shoe.

We found an impressive 80.3 mm in the toe cap area, which is remarkably more than the typical shoe. 

When it comes to the tongue, the Cascadia 17 features a semi-gusseted design that ensures a snug yet comfortable fit.

While some trail runners might lean towards a fully gusseted tongue to maximise interior sealing, we believe this tongue is more gentle on the feet, especially for long-distance runs.

A big change from the previous Cascadia is the tongue-padding. The Cascadia 16 had a super-thick 12.2-mm tongue, while this model showcases a much-slimmer 4.7-mm design—almost a third of the thickness!

But there's no need to worry. Even though 4.7 mm might appear on the slim side for longer workouts—and we'd have liked a 6 or 7-mm thickness—this change doesn't compromise comfort too much.

On the heel, we find a original and rare pull tab. Instead of the typical finger-loop design, this one attaches to the shoe with velcro, letting us adjust it to our preference.

The insole in this shoe is conveniently removable, allowing you to effortlessly fit your own custom third-party orthotics.

While a vast majority of trail runners don't venture out into the mountains after dark, a minority relish the thrill of lighting up their path with a headlamp and hitting the trails. This group would certainly have welcomed such a feature for those night runs. Maybe we'll get it in the Cascadia 18!