• Terrain


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


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

    Stability / overpronation / normal arch

    Shoes for runners who need mild to moderate arch support (Around 45% of runners). Best for runners with a low arch. See the best stability shoes.

    Motion control / severe overpronation / 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.

  • Use

    Daily running

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


    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
  • Weight
    Men: 8.1oz
    Women: 6.6oz
  • Heel to toe drop
    Men: 6mm
    Women: 6mm

    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.

  • Heel height
    Men: 28mm
    Women: 28mm
  • Forefoot height
    Men: 22mm
    Women: 22mm
  • Width
    Men: normal
    Women: normal
  • Release date
    Nov 2017
Show more facts


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.


Expert Reviews

Experts are runners, 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.

91 / 100 based on 6 expert reviews

  • 87 / 100 | Running Warehouse

    A lightweight and flexible design paired with fantastic comfort, the On Cloud X delivers a unique running experience that can handle anything from tempo runs to daily training.

  • 82 / 100 | Belive in the Run

    It's a comfortable shoe to wear around so that's why would recommend it for someone who's not looking for high mileage maybe runs 12 miles a week and then does their workout. This would be a great shoe for that.

  • 98 / 100 | Road Trail Run

    The Cloud X is a spectacular looking shoe with great versatility for a number of faster running and potentially for other “purposes"of the gym and lifestyle variety.

  • 98 / 100 | Road Trail Run

    Tempo’s [sic], races and workouts for me. [The On Cloud X] shined so well on the track as well. Don’t count this out for the oval office.

Show moreless reviews
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Updates to On Cloud X

  • 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.

On Cloud X size and fit

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.

CloudTec® uses Zero-Gravity foam, which works under the concept of support without pressure, resulting in a shoe that feels almost weightless.


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 the 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.