kyrie 1 gray and orange nike outlet blue | Our verdict
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Pros
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- Accommodates wide feet with ease
- Full-length, responsive Pebax midsole
- Equipped with a Vibram Megagrip outsole
- Ideal for long-distance training
- Offers outstanding comfort
- Remarkably stable
- Suitable for 100-mile races
Cons
- The Vaporweave upper could be more durable and breathable
- Heavier than expected even for a trail racing shoe
- The £270 price tag might be steep for some
Audience verdict
- Top 5% in trail running shoes
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Comparison
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Audience score | 92 Superb! | 89 Great! | 86 Good! | 87 Great! | |
Price | $260 | $225 | $200 | $150 | |
Trail terrain | Light terrainModerate terrain | Moderate terrain | Moderate terrain | Moderate terrainTechnical terrain | |
Arch support | Neutral | Neutral | Neutral | Neutral | |
Weight lab Weight brand | 10.5 oz / 299g 10.1 jordan retro 17 for sale | 9.1 oz / 257g 8.8 kyrie 1 gray and orange nike outlet blue | 9.5 oz / 269g 9.1 oz / 258g | 10.8 oz / 305g 10.6 safari roshe run for sale | |
Drop lab Drop brand | 11.8 mm 8.5 mm | 5.6 mm 5.0 mm | 7.1 mm 6.0 mm | 8.9 mm 6.0 mm | |
Strike pattern | Heel | Mid/forefoot | Mid/forefoot | HeelMid/forefoot | |
Midsole softness | Soft | Balanced | Soft | Soft | |
nike kd vi illusion for sale on youtube today full | Small | Small | Small | Small | |
Plate | Carbon plate | Carbon plate | Carbon plate | - | |
Toebox durability | Very bad | Good | - | Decent | |
royal blues jordans nike outlet mall | Good | Bad | - | Good | |
Outsole durability | Good | Good | - | Decent | |
Breathability | Moderate | Moderate | Moderate | Breathable | |
nike hyperdunk elite 2012 black blue color hair | Medium | Medium | Narrow | Medium | |
Toebox width at the big toe | Medium | Narrow | - | Medium | |
Stiffness | Stiff | Stiff | Stiff | Moderate | |
Difference in stiffness in cold | Small | Small | Small | Small | |
Torsional rigidity | Stiff | Stiff | Stiff | Stiff | |
Heel counter stiffness | Moderate | Moderate | Moderate | Stiff | |
Lug depth | 3.0 mm | 3.6 mm | 3.4 mm | 4.0 mm | |
Heel stack lab Heel stack brand | 36.6 mm 38.0 mm | 37.4 mm 32.0 mm | 33.4 mm 36.0 mm | 36.7 mm 39.0 mm | |
Forefoot lab Forefoot brand | 24.8 mm 29.5 mm | 31.8 mm 27.0 mm | 26.3 mm 30.0 mm | 27.8 mm 33.0 mm | |
Widths available | Normal | Normal | Normal | Normal | |
Season | Winter | Summer | Winter | Summer | |
Removable insole | ✓ | ✓ | ✓ | ✓ | |
Orthotic friendly | ✓ | ✓ | ✓ | ✓ | |
Ranking | #6 Top 3% | #45 Top 18% | #125 Top 50% | #100 Top 40% | |
Popularity | #96 Top 38% | #148 Bottom 41% | #156 Bottom 38% | #108 Top 43% |
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Based on our lab tests, the eagerly anticipated Nike Ultrafly is a top pick for:
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- Ultra-marathoners looking for the ultimate racing shoe.
- Trail runners with a flexible budget who desire a high-performance shoe providing both comfort and speed.
Who should NOT buy
If you're after an ultra-light trail racing shoe, the Nike Ultrafly might not be the one. Tipping the scales at over 10 ounces in our lab, it doesn’t exactly feel lightweight. For something much lighter, consider the Hoka Zinal 2, or for a more balanced approach between cushioning and weight, the Saucony Endorphin Edge.
Additionally, the Ultrafly comes with a hefty price tag. If you're looking to save some money and don't mind a slightly less responsive midsole, we suggest excellent well-rounded alternatives like the Brooks Cascadia 17 or the Saucony Peregrine 13 available in the market.
kyrie 1 gray and orange nike outlet blue | Breathability
The much-anticipated Ultrafly arrived with a big surprise, featuring Vaporweave—a technology that seemed to have been abandoned by Nike after its debut in the first-generation Vaporfly.
Vaporweave is an ultra-thin mesh that faced criticism for poor breathability. So, our expectations weren't high before testing, particularly because the Ultrafly combines this mesh with a comfort-focused fabric underneath as can be seen in the video above.
However, the Ultrafly earned a 3/5 in our smoke-pumping test, which is not a bad result for this type of plasticky upper.
Using a light, we confirmed that the Vaporweave upper doesn't have any big breathability holes, a common feature in trail running shoes.
Under the microscope, we discovered some tiny holes responsible for the shoe's average breathability score. Without these holes, the shoe would have likely scored a 1/5.
Ultrafly | 3 |
Average | 3.3 |
Durability
Toebox durability
Durability is crucial for trail shoes, yet the Vaporweave upper of the Ultrafly disappoints in this regard. Without any significant protective strips, it offers little resistance, scoring a mere 1/5 in our Dremel test.
However, it's important to note that this shoe isn't designed for harsh, rocky technical terrains, but rather for ultra running on easier trails. In such conditions, the lack of durability isn't as critical, but it's a notable compromise for a trail shoe anyway.
![nike ultrafly toebox durability 20940849 main](https://cdn.runrepeat.com/storage/gallery/product_content/40119/nike-ultrafly-toebox-durability-20940849-main.jpg)
Ultrafly | 1 |
Average | 3 |
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Accustomed to firm, brick-like trail midsoles, the Ultrafly provides a cloud-like experience like no other.
With a durometer of just 9.8 HA, its full-length, Pebax-based ZoomX midsole offers world-class energy return.
There is a caveat, though. The forked carbon plate embedded in the midfoot results in a slightly firmer feel than the durometer reading suggests. However, this also contributes added stability and snappiness to the shoe.
![Nike Ultrafly royal blues jordans nike outlet mall](https://cdn.runrepeat.com/storage/gallery/product_content/40119/nike-ultrafly-heel-padding-durability-20940850-main.jpg)
Ultrafly | 5 |
Average | 2.9 |
Outsole hardness
Runners often criticised Nike outsoles for their poor grip and quality. However, those days are behind us with the Ultrafly because the Oregon-based brand has FINALLY teamed up with Vibram.
The Megagrip Litebase outsole in a Nike shoe for the first time is a game-changing collaboration.
Our measurements confirmed what we anticipated, with the outsole coming in just below average for trail shoes, at 80.5 HC.
![Nike Ultrafly Outsole hardness](https://cdn.runrepeat.com/storage/gallery/product_content/40119/nike-ultrafly-outsole-hardness-20940853-main.jpg)
Ultrafly | 80.5 HC |
Average | 85.3 HC |
Outsole durability
Vibram outsoles are known for their solid performance in durability, and the results of our third Dremel test did not disappoint.
We observed a mere 0.7 mm dent after this rigorous test, a result that is positively encouraging.
![Nike Ultrafly Outsole durability](https://cdn.runrepeat.com/storage/gallery/product_content/40119/nike-ultrafly-outsole-durability-20940851-main.jpg)
Ultrafly | 0.7 mm |
Average | 1.0 mm |
Outsole thickness
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The Ultrafly offers outstanding grip on flat terrain.
With an outsole measuring just 1.0 mm, it's quite thin, aiming for weight reduction. However, you can expect sufficient durability, thanks to the proven toughness of the Vibram rubber.
![Nike Ultrafly Outsole thickness](https://cdn.runrepeat.com/storage/gallery/product_content/40119/nike-ultrafly-outsole-thickness-20940852-main.jpg)
Ultrafly | 1.0 mm |
Average | 2.4 mm |
Weight
Despite Nike efforts, the most disappointing aspect of this shoe is definitely its weight.
Weighing in at 10.5 oz (299g), it's excessively heavy for a racing shoe, especially one with a Vaporweave upper. We're confident that Nike has the capability to significantly improve in this regard, so hopefully, we'll see a lighter version in version 2.
![nike ultrafly weight 20940872 main](https://cdn.runrepeat.com/storage/gallery/product_content/40119/nike-ultrafly-weight-20940872-main.jpg)
Ultrafly | 10.55 oz (299g) |
Average | 10.34 oz (293g) |
Cushioning
Heel stack
If you're in search of a cushioned trail running shoe, your search ends here. With a thickness of 36.6 mm, it stands as one of the thickest models on the market, and performs phenomenally in this aspect. The miles just seem to effortlessly roll by in every long run.
![Nike Ultrafly Heel stack](https://cdn.runrepeat.com/storage/gallery/product_content/40119/nike-ultrafly-heel-stack-20940854-main.jpg)
Ultrafly | 36.6 mm |
Average | 32.1 mm |
Forefoot stack
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Although some runners might desire extra cushioning in this area for an ultra-distance shoe, we believe the current amount is sufficient in the Ultrafly. Adding more foam would have increased the weight of an already heavy shoe unnecessarily.
![nike ultrafly forefoot stack 20940855 main](https://cdn.runrepeat.com/storage/gallery/product_content/40119/nike-ultrafly-forefoot-stack-20940855-main.jpg)
Ultrafly | 24.8 mm |
Average | 24.4 mm |
Drop
Nike claims an 8.5-mm drop, but our measurement shows 11.8 mm. Wondering why such a discrepancy occurs? We've got an advanced, in-depth explanation to clear things up.
While it may seem higher than usual in trail shoes, it feels slightly less steep underfoot because of its geometry, and it's a marvel for heel strikers.
![Nike Ultrafly Drop](https://cdn.runrepeat.com/storage/gallery/product_content/40119/nike-ultrafly-drop-2-20949861-main.jpg)
Ultrafly | 11.8 mm |
Average | 7.8 mm |
Insole thickness
The insole is very cushioned, contributing to the overall plush and comfortable feel during runs. While the Ultrafly it's a bit heavy for a racing shoe, it's important to note that the extra weight is entirely devoted to enhancing comfort.
![nike ultrafly insole thickness 20940863 main](https://cdn.runrepeat.com/storage/gallery/product_content/40119/nike-ultrafly-insole-thickness-20940863-main.jpg)
Ultrafly | 5.3 mm |
Average | 4.7 mm |
Midsole softness
Accustomed to firm, brick-like trail midsoles, the Ultrafly provides a cloud-like experience like no other.
With a durometer of just 9.8 HA, its full-length, Pebax-based ZoomX midsole offers world-class energy return.
There is a caveat, though. The forked carbon plate embedded in the midfoot results in a slightly firmer feel than the durometer reading suggests. However, this also contributes added stability and snappiness to the shoe.
![Nike Ultrafly Midsole softness](https://cdn.runrepeat.com/storage/gallery/product_content/40119/nike-ultrafly-midsole-softness-20940860-main.jpg)
Ultrafly | 9.8 HA |
Average | 22.8 HA |
Midsole softness in cold
We tested the Ultrafly in the lab to simulate those cold, bone-chilling winter runs and then remeasured its softness. Our durometer showed a result of 11.8 HA.
![Nike Ultrafly Midsole softness in cold](https://cdn.runrepeat.com/storage/gallery/product_content/40119/nike-ultrafly-midsole-softness-in-cold-20940861-main.jpg)
Ultrafly | 11.8 HA |
Average | 28.5 HA |
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Given that ZoomX is a Pebax-based midsole, it was crystal clear that it would excel (+20.5%) even after being exposed to cold temperatures. We go deep into this in our advanced guide on the topic.
Ultrafly | 20.5% |
Average | 26.5% |
Stability
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With its impressive height and plush feel, it seemed unlikely that this shoe would rank as one of the most stable in trail running.
However, we can confidently say it's far more stable than retro might expect before trying it out. We will show you how Nike accomplished this feat.
Torsional rigidity
The primary method they've used is incorporating an ultra-stiff, forked carbon plate, which lead to a 5/5 in our manual assessment about torsional rigidity.
While this might compromise comfort somewhat, it proves to be a game-changer for stability, particularly in shoes like this, with an exceptionally soft midsole.
Ultrafly | 5 |
Average | 3.5 |
Heel counter stiffness
The heel counter features moderate stiffness at 3/5, adding to the overall increase in stability, and it's clear that Nike still has a few more tricks up its sleeve if needed.
Ultrafly | 3 |
Average | 3.1 |
Midsole width in the forefoot
The key factor behind the shoe's considerable weight and exceptional stability is its impressively wide midsole.
Measuring 122.1 mm in the forefoot, Nike's designers recognised the need for dimensions beyond what a Vaporfly offers to suit trail conditions effectively.
![Nike Ultrafly Midsole width in the forefoot](https://cdn.runrepeat.com/storage/gallery/product_content/40119/nike-ultrafly-midsole-width-in-the-forefoot-20940866-main.jpg)
Ultrafly | 122.1 mm |
Average | 112.0 mm |
Midsole width in the heel
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This ensures that the shoe accommodates all footstrikes with proper stability, regardless of whether you land towards the front or back of your feet.
![nike ultrafly midsole width in the heel 20940865 main](https://cdn.runrepeat.com/storage/gallery/product_content/40119/nike-ultrafly-midsole-width-in-the-heel-20940865-main.jpg)
Ultrafly | 93.4 mm |
Average | 89.7 mm |
Flexibility
Stiffness
This shoe underwent a seemingly endless development period. We spotted it being tested in the wild almost two years before its release, and we're aware that its forked plate underwent numerous changes during development.
Full-length carbon plates are rare in trail shoes, with most brands choosing shorter or forked plates.
The Ultrafly follows that trend featuring a midfoot plate that adds exceptional stiffness to the shoe, surpassing even our expectations. However, it's not a full-length carbon plate, although it goes longer than it seems in the image because of its forked shape.
In our 90-degree bend test, it required a substantial 40.5N of force to bend the shoe.
Ultrafly | 40.5N |
Average | 28.3N |
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We followed the same procedure as with the midsole softness test—a 20-minute pause followed by another measurement.
This time, the shoe registered a higher stiffness at 48.8N.
Ultrafly | 48.8N |
Average | 38.3N |
Difference in stiffness in cold
This represents a 20.5% increase in stiffness, a positive outcome that aligns with our expectations for a premium foam like ZoomX.
Ultrafly | 20.5% |
Average | 35.2% |
Grip / Traction
Lug depth
One crucial feature of any trail shoe is the lugs. The Ultrafly features short 3.0-mm lugs, designed for easy trails and fast running but not specifically for technical or muddy terrain.
However, the lugs on this Vibram outsole are certainly capable of handling more challenging areas when necessary.
![nike ultrafly lug depth 20940869 main](https://cdn.runrepeat.com/storage/gallery/product_content/40119/nike-ultrafly-lug-depth-20940869-main.jpg)
Ultrafly | 3.0 mm |
Average | 3.6 mm |
Size and fit
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With the massive width of the midsole, we anticipated a wide toebox—yes, even for a Nike shoe. And we weren't disappointed! Measuring 100.7 mm, this shoe is clearly designed for those with regular and wide feet.
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![Nike Ultrafly nike hyperdunk elite 2012 black blue color hair](https://cdn.runrepeat.com/storage/gallery/product_content/40119/nike-ultrafly-toebox-width-at-the-widest-part-20940867-main.jpg)
Ultrafly | 100.7 mm |
Average | 98.8 mm |
Toebox width at the big toe
The insole is removable, and thanks to the generous dimensions of both the midsole and upper, there’s ample room to accommodate insoles from other shoes or custom orthotics with ease.
![Nike Ultrafly Toebox width at the big toe](https://cdn.runrepeat.com/storage/gallery/product_content/40119/nike-ultrafly-toebox-width-at-the-big-toe-20940868-main.jpg)
Ultrafly | 80.6 mm |
Average | 78.9 mm |
Comfort
Tongue padding
Designed mainly for ultra-marathons like the Western States Endurance Run, it was almost essential for Nike to include a plush, comfort-focused tongue in this shoe. It helps prevent lace bite and similar issues.
While this feature impacts the shoe's weight, we believe Nike could have opted for a 3-to-4-mm tongue instead of the 6.1 mm one. However, unlike in road running, most trail runners will likely appreciate the extra padding of the tongue, even if it means a few additional grammes.
![Nike Ultrafly Tongue padding](https://cdn.runrepeat.com/storage/gallery/product_content/40119/nike-ultrafly-tongue-padding-20940871-main.jpg)
Ultrafly | 6.1 mm |
Average | 6.4 mm |
Heel tab
The Ultrafly doesn't have a heel tab, but Nike has added a cool touch by incorporating a sleek plastic piece featuring their trail running logo.
![nike ultrafly heel tab 20940870 main](https://cdn.runrepeat.com/storage/gallery/product_content/40119/nike-ultrafly-heel-tab-20940870-main.jpg)
Ultrafly | None |
Removable insole
The insole is removable, and thanks to the generous dimensions of both the midsole and upper, there’s ample room to accommodate insoles from other shoes or custom orthotics with ease.
![Nike Ultrafly Removable insole](https://cdn.runrepeat.com/storage/gallery/product_content/40119/nike-ultrafly-removable-insole-20940873-main.jpg)
Ultrafly | Yes |
Misc
Reflective elements
Nike has added some reflective elements to the Ultrafly, but we believe they could enhance this feature. Perhaps incorporating a reflective swoosh?
Ultrafly | Yes |