We spent 6.9 hours reading reviews from experts and users. In summary, this is what runners think:

6 reasons to buy

  • Many people stated that the midsole unit of the Nike Zoom Fly Flyknit was highly responsive to their movements.
  • The carbon fiber plate integrated into the midsole gained some fans as it apparently helped in making each step as springy as possible.
  • The Flyknit upper was considered by most consumers as one of the best cover systems in the market because it secured the foot in a lightweight and breathable wrap.
  • Several runners were happy that this shoe accommodated their sizing expectations.
  • Purchasers have lauded the aesthetics of the Nike Zoom Fly Flyknit, stating that its looks were visually striking.
  • This shoe just felt fast, according to more than a handful of users.

4 reasons not to buy

  • Some people complained that the outsole unit already started to wear off after only a few uses.
  • Several individuals noted that this shoe’s profile was heavy for their tastes, emphasizing that it didn’t allow them to wear it for very long.
  • The removable nature of the insole caused it to shift around irritatingly, a few testers observed.
  • The collar tended to rub against the ankles, causing discomfort, according to some consumers.

Bottom line

The Nike Zoom Fly Flyknit offered a lot when it comes to responsive performance on the roads. People were generally happy with the touted younger brother of the Vaporfly 4%. They welcomed the fresh looks, the fast heel-to-transitions, the high-quality midsole, and the breathable Flyknit upper. On the other hand, there were those who complained that the weight of this road shoe was more substantial than they anticipated; others weren’t happy with the easy-to-wear-off outsole and the way the collar chafed the ankles irritatingly.



A top rated Road running shoe
A top rated Nike running shoe
Top 2% most popular running shoes

Expert Reviews

89 / 100 based on 37 expert reviews

  • 97 / 100 |

    Nike Zoom Fly Flyknit – For the days you want to run fast

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    The Zoom Fly Flyknit offers much of the technology of the Vapor Fly 4% without the hefty £250 price tag. It's sock-like upper provides an extremely comfortable fit, and the shoe encourages a fast, fluid pace.

    The Zoom Fly Flyknit has cemented itself as my first choice for fast training and racing.



    • Very responsive
    • Provides cushioning and speed
    • Incredibly comfortable sock-like upper


    • Not as light as many racing shoes
    • Question over durability of sole


    Before beginning this review, I feel that I should confess that I’ve never run in a Nike shoe.

    It’s not that I’ve had anything against Nike; I’ve read the hype, seen the die-hard Nike addicts swear allegiance to their manufacturer-of-choice and the despair of those trying desperately to secure a pair of Vaporfly 4% shoes each time Nike release another batch.

    I’ve generally found however that a combination of New Balance and Brooks suit me well for road running, with Inov8 delivering everything I need off-road. Despite this, I really felt that I should try a pair of Nike running shoes, and then I saw the release of the Zoom Fly Flyknit.

    This is the second version of Nike’s Zoom Fly – a kind of "affordable" version of the Vaporfly 4% which now incorporates the same full-length carbon-fiber plate that was instrumental in the 2017 sub-2 hour marathon attempt. I figured that it was time to give them a go.



    I have to hand it to Nike the Zoom Fly FK looks like a fantastically fast shoe. One you also know you could happily combine with a pair of jeans or casual shorts should you wish.

    Taking it out of the box, I couldn’t help admiring the streamlined look of the shoe right down to the way that the midsole is formed to a point at the back of the shoe. The upper looks and feels great, and even the "Nike Racing" branded insole and aglets are designed to inspire a "let’s go out and do this feeling."



    Nike offers the Zoom Fly FK in a range colorways including an aptly named "Bright Crimson" which appears more like an orange, and a "Blue Orbit."

    Each of which will help you make a visual statement that will see you stand out from the pack unless you happen to be at the front end of one of the marathon majors when most of the elite field are often sporting bright orange Vapor Fly shoes!

    I chose the rather understated Black/White/Gunsmoke colorway and was immediately impressed with the shoe. In reality, I’m sure that it’ll come as no surprise that Nike has once again designed a great looking shoe.


    Weight & drop

    The Zoom Fly Flyknit is listed as 238g (8.7oz). This certainly isn’t as light as the premium end Vaporfly 4% which comes in at 184g, or similar racing shoes such as 1400v6 Racing Shoe at 204g.

    The key, however, is that I don’t feel that this is a shoe that stays in its box until race day, but rather one that can be used for more regular tempo and fast training sessions. And so, it compares favorably to other light training shoes such as the Fresh Foam Zante v4 at 244g.

    As expected, my UK 13.5 (US14) shoe weighed in heavier than the standard shoe, at 335g. I don’t have a picture of the shoe sitting on a pair of scales, so you’ll need to use your imagination.



    In the case of the Zoom Fly Flyknit, in consideration of the weight of the shoe, one must take into account the overall way in which the shoe works. This will be considered further below.

    But how the carbon fiber plate works to help propel you forward certainly outweighs the effect of a few extra grams of weight. The heel stack is 33mm with a forefoot height of 23mm, providing a heel to toe drop on this shoe of 10mm.


    The Zoom Fly Flyknit fits true-to-size. In my case, that’s a UK 13 (US 14) which is the same size I’d wear in Brooks, Inov-8, and ASICS.

    For reference, I’d tend towards a ½ UK size larger in New Balance shoes, as well as Hoka and Salomon. US readers, please note that despite the variation in sizing across manufacturers, I almost always require a US 14 / EU 49. It’s quite possible that the differences in sizes, therefore, are due to conversions from US to UK sizing.



    Aside from the sizing, the Zoom Fly Flyknit fits uniquely, certainly with respect to any running shoes I’ve worn before. When I initially picked up the shoe, the Flyknit upper felt very thin and light, and I anticipated that the shoe would feel loose, and expected that I’d have to tie it tight.

    Putting the shoe on, I found that tongue is formed from an elasticated mesh which serves to hold the upper snug around the foot, whilst an elasticated section at the top of the heel cup provides a similar role around the ankle.

    Many manufacturers claim a "bootie-like construction," but this shoe is almost sock-like in its fit and the way it wraps around the foot seamlessly. I’d be inclined to think that the shoe could be worn without laces such is the manner in which the tongue works to hold the foot.



    Indeed, the way the lace loops are formed from the Flyknit upper means that it is difficult to pull the laces through to tighten. As such, I didn’t worry about tying the laces too tight, and instead allowed the tongue and the mesh upper work together to hold the foot.

    In summary, I’d agree with Nike’s claim that the "Flyknit upper delivers ultra-lightweight support that fits like a glove."



    The Flyknit upper is essentially a single piece of knitted engineered mesh, in which the density of knit and elasticity of the mesh varies in different parts of the upper to provide breathability, flexibility and hold just where you need it.

    More than any other running shoe I’ve worn, putting on the Zoom Fly Flyknit feels more like pulling on a sock that stepping into a shoe. 



    Nike themselves explain that "fusible yarns create zones of structure and support without adding weight." There’s certainly no overlays other than the Nike swoosh, and there are no seams within the upper: as described above, the tongue is seamlessly knitted into the rest of the shoe.

    At front of the shoe, there’s no toe bumper to speak of except where the outsole rolls over the front of the upper. There is no rigid heel counter, though a felt-like liner is glued inside the Flyknit, which also incorporates a small section of padding where the cup wraps around the Achilles.



    A pull tab at the back helps to pull the shoe on around the heel, and as mentioned above, the top of the heel cup is formed from an elasticated piece of Flyknit which extends from the tongue and provides a comfortable, snug fit to the ankle

    The result is an extremely comfortable breathable sock-like upper which holds the foot naturally and which inside which I’d be more than happy to run without socks.



    The midsole of the Zoom Fly Flyknit comprises of the same full-length carbon-fiber plate as the Vaporfly, sandwiched between Nike’s React foam. This React foam replaces the lighter, and somewhat more responsive, Zoom X foam used in the Vaporfly.

    Other than that, the depth of midsole and drop are very similar across the two models of shoe.



    Nike explains that their React foam was developed to provide the desired absorption and cushioning at the same time delivering energy return 13% greater than its forerunner Lunarlon foam which was incorporated into the original Zoom Fly shoe (with a plastic plate).

    Without extensive testing facilities at my disposal, I can’t really confirm these claims except with the running equivalent of a car buyer "kicking the tyres" pressing in the midsole of the shoe it certainly feels firm, yet cushioned.

    There’s no doubt that the foam very quickly and forcefully returns to its original shape once released.



    The carbon-fiber plate means that the shoe doesn’t have the same flexibility as other shoes; there’s no point trying to bend the front of the shoe as the plate just won’t let you.

    Amongst other things, the carbon-fiber plate prevents the toes from bending to begin the spring off and instead encourages the foot to rock forward. The effect of this is discussed within the "performance" section below.


    The outsole of the Zoom Fly Flyknit has been tried-and-tested in the original Zoom Fly and the various iterations of the Vapor Fly shoe.



    The heel section incorporates five sections of high-abrasion rubber to protect the React foam, while the entire forefoot section of the outsole is made of foam rubber. While this will similarly protect the midsole, it also provides greater traction and adds a little more cushioning and spring to forefoot landings and take-off.


    To date, I’ve run approximately 100 miles in these shoes, and there is very little wear to the shoe. I do have a tendency to brush the outside of my heel as I land, and on the photo, you will see a little wearing to the React foam where this occurs.

    For me, this tends to occur in any shoe with an exposed foam sole, and I usually remedy this with the application of a little Shoe Goo. In any case, this is unlikely to affect the durability of the shoes.



    What is difficult to determine is the durability of the carbon-fiber plate. I certainly haven’t experienced any degradation in its performance to date, though there is anecdotal evidence of the plate in the Zoom Fly shoe having a limited lifespan.

    As a mid-pack runner, I would expect to run these shoes for at least 500km, though at this stage I can’t say how much more I’ll get from these shoes.


    Running shoes are highly personal, and so my experience of shoe performance should always be balanced against my own characteristics. As mentioned above, I’m more of a mid-pack runner at 48, 6’2” and currently around 87kg (190lbs), running 50-60 miles pw.

    My road running goals for this year are to achieve a sub 3:10 marathon and a sub 19’ 5k. My view of the performance of these shoes should, therefore, be balanced against my own level of performance.

    As mentioned at the top of the review, I haven’t previously run in a Nike shoe. As such, I can’t compare these to the previous version of the Zoom Fly, nor the shoe’s older (and more expensive) brother, the Vapor Fly.

    The first time laced them up and walked to where I’d begin to run; I immediately began to understand the difference that the carbon-fiber plate makes. Even as I walked, I found myself being rocked forward into the next step.

    The stiffness of the sole/plate means that instead of waiting for the toes to bend and the calf to contract to begin the push off, the plate causes the foot to rock forward into the next step. And at this stage, I was just walking!



    I’d initially planned an easy run to try out the shoes, but it soon became evident that these shoes are not designed for easy running. I tend to find myself running in a more upright position at slower paces, but in the Zoom Fly Flyknit, found myself being propelled forward.

    As a result of this, I naturally increased my pace and whilst I can’t claim that a faster pace was any easier, I certainly felt encouraged to run more quickly!

    It is difficult to explain the difference between these and more traditional shoes to anyone who has not worn a shoe with this type of plate. As the foot lands, it feels as if the carbon-fiber plate "rocks" the foot forward through a quick transition and a feeling of “spring off” into the next stride.

    Since then, I’ve used these shoes primarily for faster training sessions, both tempo and interval, and for a recent half-marathon race. I’ve found that the shoe performs exceptionally well in these situations.

    During fast sessions, the shoe delivers a stable, cushioned landing followed by a fast transition and a springy push off. It’s easy to get up to speed in the Zoom Fly Flyknit, and I have to agree with Nike’s marketing that the shoe provides a "smooth, responsive ride."

    To date, I have only worn the shoe in one race which was the Chester half marathon (I only managed to find one photo where I hadn’t hidden behind other runners!)



    During these longer races, the shoe seems to make it easier to maintain a fluid stride even as fatigue sets in towards the end of the race. I’m looking forward to wearing them for my next road marathon later this year.

    It should be noted that these shoes offer no structural support, and so are designed purely for the neutral runner.


    Nike is currently marketing these shoes under the tagline "Beyond your Fastest" and I’d love to be able to claim that the Zoom Fly Flyknit has helped me to achieve a handful of personal bests. Unfortunately, that hasn’t been the case in the short time I’ve been wearing these shoes, but I’m living in hope!

    In terms of performance, I am really enjoying having the Zoom Fly Flyknit in my rotation, and it has become my go-to shoe for fast training sessions and races.




    In that sense, it has replaced my previous choices, the New Balance Fresh Foam Beacon and  Zante v4, although fortunately, the versatility of these shoes means that they will continue to find a use for other sessions.

    For many, the Zoom Fly Flyknit will be seen as a lower cost alternative to the Vapor Fly. Whilst the shoes share some of the same technology, the Vapor Fly retails at £250 (when you can get one) whilst the Zoom Fly Flyknit is widely available at the time of writing for less than £100.

    At that price, I’m sure that I won’t be the only one to decide that I’m more than happy with my Zoom Fly Flyknit! Furthermore, I’m confident that the lower price point and the differences in design make this a shoe for fast-paced training sessions as well as races.

    On top of the performance aspect of the shoe, I’ll finish with the fact that this is a great looking shoe which fits like a glove and will find plenty of use casually once it’s been retired from running.

  • 95 / 100 |

    Nike Zoom Fly Flyknit: How does this speedy shoe perform?

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    The Nike Zoom Fly Flyknit is the younger brother of the famed Vaporfly 4% that Eliud Kipchoge and 2 other of the best distance runners wore at Nike’s Breaking 2 Marathon challenge.

    It looks the same, has the same carbon fiber plate, and it performs extremely well.


    First impressions

    In terms of looks, it’s simple, nice, and looks fast. It also has little designs on the laces, and the fly knit weave looks nice.


    The midsole of this shoe uses Nikes React foam. The foam is very responsive and very durable.

    Unlike the Zoom X or the Cushlon foam, this foam takes a lot more miles and is much more durable, so that’s the one thing I think this shoe has over the other VaporFlys or older Zoom Fly shoes.



    The midsole is very cushioned and very responsive, and although there is no midfoot outsole, I don’t think I’ll see much wear and tear for a couple of hundred miles due to how the Epic React surprisingly held up after 400 miles.

    Another big feature of it is the use of a carbon fiber plate. That is used to act as a spring essentially and helps the foot spring off a little bit more on the toe-off. 


    The outsole of this shoe is very simple and pretty minimal. There is high abrasion rubber in the forefoot and the perimeter of the heel, but none covering the midfoot.

    At first, that worried me, but due to the way the React foam is so durable, I believe these can go 300 miles no problem. 



    The ride of this shoe is very different from every other shoe I’ve run in. That is because of the carbon fiber plate.

    Without the carbon fiber plate, I believe the shoe would feel like the Epic React Flyknit 2 because that’s exactly what it is, just with a plate. But the plate adds a completely different feel.

    On foot walking and at slow paces, it’s stiff and unstable, but at faster paces it’s perfect and definitely makes the stride so much more efficient.

    The first run I had in these was a 3-mile tempo, and it performed very well, it was also my first run in a carbon fiber plate, so it was different but a good different.



    I also did an interval run, 11 x 2:00 minutes, then ending with 4 x 200m at around 5-minute pace, and it felt good except it was on a 160m indoor track, and with the amount of cushioning of the shoe the tight curves felt pretty unstable, but the straightaways felt great.

    I had also done a couple of long runs in this shoe, and the plate does help the stride efficiency, especially in the later miles when the fatigue and tiredness sets in. In all, the shoe felt great for what it is made for, longer faster runs and even faster shorter runs, and that is what I rated this shoe on.


    In terms of breathability, this shoe is very breathable. There's the Flyknit upper, which is basically a weave with holes and is as breathable as it looks. It’s very well-engineered and very breathable as well as light. 


    I’m going to straight-up say, this is THE STIFFEST, and I mean STIFFEST shoe I have ever run in.



    But that is not a bad thing at all. In this shoe’s case, it is actually a very good thing and worked out 100%. Obviously, that is because of the carbon fiber plate.

    I can’t even press my hardest and bend this shoe more than 3 inches at faster paces and race pace that is very good and acts as a spring.

    At slower paces, this doesn’t necessarily feel bad but just feels a little unstable. So there isn’t really much flexibility in the shoe, but with the shoe being meant for faster paces that works out perfectly for the shoe. 


    The responsiveness of this shoe is the top tier. It has everything needed to be responsive, a carbon fiber plate, which, as I said, is basically a spring. It also has the React cushioning, which is naturally responsive as well. 


    The traction of this shoe is good as well. I’ve mainly run this on dry roads and on the track which it performed well on. I had run in this shoe during a rain shower, and the traction didn’t seem to be affected that much so I say it is pretty decent.



    The retail price of these when they came out was $160, which I think is good but is probably the highest I would pay for these.

    I had gotten mine at a local thrift store for $50, which was a phenomenal price for these.



    In conclusion, I rated these shoes on how they performed for the runs. They were made for tempos, intervals, and longer faster runs.

    I think it would be wrong to review it on the cooldowns/warmup/easy runs because that's not what they were made for. That would be like reviewing a trail shoe and giving it a rating based on a road marathon, that's just simply not what it was made for.

    Overall, the Nike Zoom Fly Flyknit provided good cushioning for longer runs, the responsiveness for tempo and was fast enough for speed intervals. I think this would do good for any fast run, no matter the distance.

  • 88 / 100 | Seth James DeMoor | Level 4 expert

    I went true to size for this shoe but I will say it felt a little tight today.

  • 84 / 100 | kofuzi | Level 4 expert

    I feel like this is very snug, there's a little bit of padding in the collar area for a little bit of comfort. And there's a litt;e bit of structure down here but otherwise you've got basically you'e rrunning with a sock with a cushion on the bottom of it.

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Jens Jakob Andersen
Jens Jakob Andersen

Jens Jakob is a fan of short distances with a 5K PR at 15:58 minutes. Based on 35 million race results, he's among the fastest 0.2% runners. Jens Jakob previously owned a running store, when he was also a competitive runner. His work is regularly featured in The New York Times, Washington Post, BBC and the likes as well as peer-reviewed journals. Finally, he has been a guest on +30 podcasts on running.