Facts

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Terrain

Road

Shoes best for road, track and light gravel. See the best road shoes.

Trail

Shoes best for trail, off road, mountains and other unstable surfaces. See the best trail shoes.

Good to know

As long as you stick to the road or path, and if you want just one running shoe, buy a road running shoe.

Arch support

Neutral / cushion / high arch

Shoes for runners who does not need any additional arch support (Around 50% of runners). Best for people with high or medium high arches. See the best neutral shoes.

Stability / overpronation / normal arch

Shoes for runners who needs arch support (Around 45% of runners). Best for runners with a normal arch. See the best stability shoes.

Motion control / severe overproanation / flat feet

Shoes for runners who needs a lot of arch support. Best for runners with flat feet. See the best motion control shoes.

Good to know

- Rule of thumb: If in doubt, buy neutral shoes to avoid injuries.
- More about arch support in this video.
- Find your arch type by following steps from this video.

Daily running

Cushioned shoes for your daily easy running. Great comfort. See best shoes for daily running.

Competition

Lightweight shoes good for races, interval training, tempo runs and fartlek. Here are the best competition running shoes.

Good to know

If you want just one pair of shoes, buy a shoe for daily running.

Price
$120
Weight
Men: 7.5oz
Women: 6.3oz
Show more facts

Road

Shoes best for road, track and light gravel. See the best road shoes.

Trail

Shoes best for trail, off road, mountains and other unstable surfaces. See the best trail shoes.

Good to know

As long as you stick to the road or path, and if you want just one running shoe, buy a road running shoe.

Neutral / cushion / high arch

Shoes for runners who does not need any additional arch support (Around 50% of runners). Best for people with high or medium high arches. See the best neutral shoes.

Stability / overpronation / normal arch

Shoes for runners who needs arch support (Around 45% of runners). Best for runners with a normal arch. See the best stability shoes.

Motion control / severe overproanation / flat feet

Shoes for runners who needs a lot of arch support. Best for runners with flat feet. See the best motion control shoes.

Good to know

- Rule of thumb: If in doubt, buy neutral shoes to avoid injuries.
- More about arch support in this video.
- Find your arch type by following steps from this video.

Daily running

Cushioned shoes for your daily easy running. Great comfort. See best shoes for daily running.

Competition

Lightweight shoes good for races, interval training, tempo runs and fartlek. Here are the best competition running shoes.

Good to know

If you want just one pair of shoes, buy a shoe for daily running.

The height difference from the heel to the forefoot, also known as heel drop, toe spring, heel to toe spring or simply drop.

There are many opinions about what a good heel drop is. We do not recommend any in particular. Lean more in this video.

Summary

We spent 9.1 hours reading reviews from experts and users. In summary, this is what runners think:

7 reasons to buy

  • A stretchy polyester yarn makes up the upper unit of this running shoe and it effectively delivers breathable support for the foot.
  • Many reviewers greatly appreciated the flexibility that the 4th version of the Free Flyknit has to offer.
  • The different designs and color schemes placed a lasting positive impression on those who tried it.
  • The underfoot comfort is precise and the cushioning is effective.
  • Reviewers thought that the rounded heel worked pretty well because it encourages a more consistent stride.
  • The Flywire integrations to the sides work really well to enhance the fit.
  • The Nike Free Flyknit 4.0 feels light and fast.

2 reasons not to buy

  • The complaints for this running shoe stem from its initially inconsistent flexibility, though over time the full flexing capability of this shoe will stand out.
  • The mild arch support wasn’t very well-received because some runners felt they deserved more underfoot cradling from this running shoe.

Bottom line

The Free Flyknit 4.0 from Nike is actually one of the most popular running shoes on the market. Many tried it out and felt the comfort, the cool design and the consistent fit that it presented. It is a neutral running companion that offers mild underfoot support, as well as responsible durability.


Rankings


Ratings

4.5 / 5 based on 884 ratings

5 star
71%
4 star
15%
3 star
5%
2 star
3%
1 star
5%

My Rating

Expert Reviews

Experts are running shoe geeks, who post reviews at youtube, directly at RunRepeat or at their own websites. Each expert is categorized from level 1 to level 5 based on expertise. See stats on expert reviews and how we calculate scores here.

Are you an expert? Apply to contribute here.

87 / 100 based on 15 expert reviews

  • 88 / 100 by Riz Knows • Jeff • Level 3 expert

    It is lightweight, breathable, thin, and super comfy.

  • 85 / 100 by Packing Lite • Packing Lite • Level 1 expert

    Although these are originally aimed at runners, they actually make for a very comfortable working shoe.

  • 95 / 100 by Believe in the Run • Thomas • Level 5 expert

    This shoe was an unexpected treat. I am pretty much over minimal shoes at this point.

  • 90 / 100 by Solereview • Solereview • Level 5 expert

    The heel area’s got a nice upwards slope or bevel for rear-foot strikers; and if you land in the front, a colony of tightly grouped foam hexagons spread loading evenly.

  • 88 / 100 by Gear Institute • Donald Buraglio • Level 5 expert

    The shoe feels like an extension of your foot, but provides just enough cushioning and responsiveness to comfortably roll through the miles.

  • 86 / 100 by Gearist • Brandon Wood • Level 5 expert

    The comfort of this shoe is hard to beat. It’s ability to adapt to the foot of a wide variety of people both in the upper and in the midsole/outsole give it a huge step up.

  • 80 / 100 by Runner's World • Runner's World • Level 5 expert

    Buttery smooth--on your foot and on the ground.

  • 90 / 100 by Running Shoes Guru • Taylor Gupton • Level 3 expert

    It’s hard to believe that the Nike Free franchise has entered its 11th year, but the barefoot-inspired series is enjoying more fans than ever with the introduction of the Flyknit upper and an update to the sole unit.

  • 90 / 100 by RunRepeat • Kyle Jang • Level 3 expert

    The Nike Free Run Flyknit 4.0 is a sharp looking shoe that combines fashion with functionality. It is very lightweight and has a flexible midsole that makes it ideal for many different kinds of athletes. The Flyknit upper is amazing and stretches to fit your foot like a sock.

  • 88 / 100 by Running Shoes And Advice • Scott Steven • Level 3 expert

    It has everything that I personally look for in a running shoe. 

  • 83 / 100 by Believe in the Run • Thomas/Meaghan • Level 3 expert

    It’s a flexible, super light shoe that has a really nice amount of cushioning.

  • 90 / 100 by Run Blogger • Peter Larson • Level 2 expert

    The Nike Free 4.0 Flyknit is a fantastic shoe, easily one of my favorites so far this year. If you want something with a minimal upper, a flexible sole, and a roomy toebox these should be at the top of your list of options to try.

  • 82 / 100 by Riot MalPal • Riot MalPal • Level 1 expert

    These are unlike any other shoes, they are just like socks.

  • 81 / 100 by Henri VITUS • Henri • Level 1 expert

    They are sweet, breathable, flexible and comfortable.

  • 77 / 100 by Kicks x2 • Kicks x2 • Level 1 expert

    The upper just makes it a really nice shoe.

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These are visual presentations, not reviews


Updates to Nike Free Flyknit 4.0

  • The Nike Free Flyknit 4.0 is a running shoe that delivers a comfortable coverage and a performance that’s reliable and consistent. Appealing color schemes are integrated into this shoe, so the runner gets more aesthetic flair when wearing it. It looks cool and it feels very responsive when taken on the roads.
  • The upper unit uses a material that resembles a woven cloth. It’s durable, breathable and very comfortable to the skin. It doesn’t restrict natural movement, so the foot is allowed more flexibility even when wearing the shoe. A snug, but secure fit is handled by the Flywire cables, which connect directly to the lacing system.
  • The mid-sole system utilizes a foam unit that’s soft, responsive and flexible. It has a low-profile height, so it doesn’t limit the movements of the foot. Still, it is able to deliver sure underfoot support that’s consistent and efficient. The 6mm drop and a rounded heel enable a more natural striking of the foot. This version has more cushioning than the Nike Free Flyknit 3.0.
  • On specific areas of the outsole is a durable rubber material that’s made to provide protection against wear and tear. Traction is also a part of this unit’s purpose. Natural flexibility is handled by hexagonal flex grooves.

Nike Free Flyknit 4.0 size and fit

The Nike Free Flyknit 4.0 has a regular shoe length. It follows the standard measurements when it comes to the men and women’s sizes. Its semi-curved shape allows the natural curvature of the foot to acclimate well to it. The available width is medium.


Outsole

When looking at the outsole layer, one can definitely notice some durable rubber placed in critical areas where wear and abrasion are most likely to appear. Aside from delivering protection, this rubber also provides traction over the surface.

Hexagonal flex grooves are cut all over the sole unit’s external surface. These grooves allow the platform to move according to how the foot flexes, so natural motion is actually being encouraged.

Waffle pistons are observed in specific sections of the outsole. They give some bounciness to each step, making sure that the foot’s landings and the liftoffs are well-cushioned and supported.


Midsole

The Phylite mid-sole material is a responsive yet durable foam unit that serves as both the underfoot platform and the outsole unit of the Nike Free Flyknit 4.0. It is not heavy, but it is able to provide sure support for the underfoot. It’s 40% rubber, so it stays strong even after many uses.


Upper

The lightweight Flyknit upper technology is one of the most breathable fabrics when it comes to running shoes. It allows air to seamlessly enter the shoe to keep the foot cool and dry. Its woven-cloth-like quality doesn’t irritate the skin, so it stays comfortable at all times.

The Flywire cables are connected directly to the lacing system. When the shoelaces are adjusted these cables follow suit, making sure that the upper unit is able to wrap around the foot in a snug, but secure manner.

A molded sock liner follows the natural contours of the foot. It supports the underside of the foot, keeping it in place and maintaining constant cradling, even for the arch.