We spent 9.3 hours reading reviews from experts and users. In summary, this is what runners think:

9 reasons to buy

  • Many runners considered the Cloud X to be the best shoe yet from On, because of its outstanding performance and the on-foot experience it brought.
  • The midsole has been incredibly light yet responsive, according to a user.
  • The shoe was extremely comfortable even from the first use, a wearer commented.
  • One athlete remarked that the shoe provided relief for their bunions.
  • The Cloud X allowed complete freedom of movement, no matter the activity, an impressed user said.
  • There was exceptional lateral support from the midsole, wrote a reviewer.
  • A buyer praised the superb cushioning that was present during high-intensity interval training (HIIT).
  • The open toe box allowed the foot to spread naturally during medium-paced runs, a runner observed.
  • The foot lockdown supplied by the midfoot area was effective in preventing slippage, as stated by a wearer.

3 reasons not to buy

  • The outsole was quite challenging to clean, according to a user.
  • Some runners felt that the sole unit was far too firm to be used as a daily runner.
  • A couple of reviewers thought the laces were too long.

Bottom line

The Cloud X from On Running managed to get high marks from consumers. Many users commended the shoe’s construction and the effectiveness of its features. It received very little criticism, but the consumers believe there is still room for improvement for the Cloud X. Overall, as a lot of people considered the Cloud X to be versatile and supportive, it is safe to say that it was a winning shoe.



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Reviews from around the internet

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Video reviews and unboxing

  • On Running introduces the Cloud X, which boldly declares itself to be the world’s lightest fully-cushioned running shoe. The shoe is marketed towards athletes who do running mixed with other types of workouts.
  • The Cloud X pays attention to the minute details: With its dual-density sock liner and seamless tongue, the shoe provides comfort unlike any other.
  • Using a high-quality engineered mesh, the upper promises optimum performance while also providing breathability. It aims to support the foot without restricting its movements.
  • The shoe features a CloudTec® sole built from the latest-evolution Zero-Gravity foam, thus enabling movements that are natural yet flawless. It is aided by Speedboard, their very own cushioning pad technology that gives a precise fit while keeping the foot in place.

The Cloud X is a running shoe that is true to size. Runners are recommended to get a size that follows their usual shoe measurements. The shoe’s moderate construction will accommodate narrow to medium foot volumes. Width profiles are available in D – Medium for men and B – Medium for women.

The outsole of the Cloud X comprises On’s patented CloudTec® outsole. Like the other running shoes from on, the Cloud X’s outsole is engineered to provide cushioning that adapts to any activity, whether all-day wear or active training time. The On Cloud running shoe also features this technology.

CloudTec® uses Zero-Gravity foam, which works under the concept of support without pressure, resulting in a shoe that feels almost weightless. This technology allows for an efficient full-speed run, such as races.

Similar to previous releases from On, the Cloud X also uses CloudTec Elements, the brand’s midsole technology that comes in the form of pods with hollow channels in the middle. These pods work by deflecting under pressure to help the shoe flex and give the foot a stable push-off from the ground. The CloudTec Elements are recognized in the ability to provide a springy ride, as the pods add bounce to each step and distribute impact during the landing phase.

On top of the CloudTec Elements is the Speedboard, a full-length synthetic plate that flexes to enable a smooth transition and a soft landing. The Speedboard is designed to work on various aspects – flexibility, energy distribution, torsion guidance, and dynamics; thus, the foot achieves a more efficient running gait and maximum performance.

The upper of the Cloud X uses a soft outer material made of engineered mesh and an inner mesh layer. With this two-layer upper system, the foot is wrapped snugly and comfortably while ensuring breathability and dynamic movement.

There is an external heel counter that offers support to the area, as well as reinforces and keeps the foot fitted in a variety of 360-degree movements.

The Cloud X uses a traditional lacing system to promote a more accessible yet more secure way of tightening the shoe.

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.