• 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.

  • Price
  • Weight
    Women: 8.3oz
  • Heel to toe drop
    Women: 10mm

    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
    Women: 29mm
  • Forefoot height
    Women: 19mm
  • Width
    Women: normal
  • Release date
    Feb 2017
Show more facts


We spent 8.6 hours reading reviews from experts and users. In summary, this is what runners think:

9 reasons to buy

  • Many consumers thought that the Adidas Ultra Boost X was suitably lightweight for daily use.
  • The cushioning system was comfortable, noted several testers.
  • The lightweight disposition of this shoe gained the favor of runners.
  • A lot of those who have tried this shoe noted that it performed well on the roads.
  • The design of this shoe was welcomed by many purchasers.
  • The personalized coverage afforded by the unique arch design of this shoe received positive feedback.
  • A runner wrote that although this running shoe was a bit pricey, it was worth the purchase because of what it offered.
  • Those with small or narrow feet felt that it fits exactly as they expected.
  • The versatility of the Adidas Ultra Boost X in terms of use is well-received; it’s considered to be great for running, for workouts and for casual walks.

5 reasons not to buy

  • Some runners felt that the sizing scheme for the Adidas Ultra Boost X was off; some felt that it was ½ size smaller while others deemed that it was ½ size larger.
  • This shoe felt a bit tight around the mid-foot section, commented several purchasers.
  • The heel section of the upper felt rough, according to a tester; it caused some blistering to the back of her feet.
  • According to a disconcerted user, this shoe had caused some stress fractures on her foot, as well as achy knees.
  • The rubber in the outsole unit tended to rub off easily, some runners observed.

Bottom line

Generally, the feedback for the Adidas Ultra Boost X was positive. Many runners enjoyed this running shoe’s performance on the roads. They also welcomed its cool design and its lightweight nature. Conversely, there were consumers who had concerns with some of its components, with some of them even complaining of injuries while wearing it.


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.

88 / 100 based on 3 expert reviews

  • 98 / 100 | Zanna van Dijk

    It is the best shoe that Adidas has ever brought out specifically for women!

  • 95 / 100 | SugarySixPack

    Overall, I really really enjoyed this shoe. Before this, I went in (kind of) thinking like nothing can beat the Ultra Boost I'm in love with.

  • 83 / 100 | The Runner Beans

    As always, I love the tread and rebound of the Ultra Boost X – they are so bouncy, with thousands of ‘energy capsules’ within the midsole that redirect energy back into your step, and a sole that is made from the same material as Continental tyres – guaranteed to take you through many miles on the roads before wearing down.

  • First look / Unboxing | Zanna van Dijk

Show moreless reviews
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Updates to Adidas Ultra Boost X

  • The Adidas Ultra Boost X is a running shoe that’s specifically designed for women. Its purpose is to move in accordance with the natural movement of the foot as it goes through the gait cycle. It even encompasses the majority of the shape of the foot via a specially designed upper that allows the fabric to wrap around the mid-foot section.
  • Visually, this shoe melds the design trends of running shoes and casual footwear. It has a cool look that’s not too striking, yet its different colorways allow the wearer to be more versatile when it comes to the aesthetics of their shoes. A knitted upper evokes the feeling of wearing a sock in lieu of actually wearing a sock.
  • One of the prime technologies of the Adidas brand is the boost™. Made up of compacted TPU pellets, this full-length foam offers responsive cushioning to the foot of the wearer. The outsole makes use of a rubber compound that is durable and efficient at delivering traction over the surfaces.

Adidas Ultra Boost X size and fit

The Adidas Ultra Boost X has a standard running shoe length. It comes in sizes that follow the regular measurements. The available width for the men and women’s versions is medium. It welcomes the runners who have medium sized feet. Its semi-curved shape naturally accommodates the form of the foot.


The rubber that is used for the outsole unit of the Adidas Ultra Boost X is from Continental™. It’s a high-quality material that protects the rest of the sole unit from the abrasive nature of the roads. It also grips surfaces well, even wet ones.

The STRETCHWEB design of the outsole allows the platform to be more flexible. The foot is then granted the opportunity to move more naturally as it transitions through the gait cycle.


The mid-sole unit of the Adidas Ultra Boost X features the boost™ cushioning system. This full-length foam is made from thousands of TPU pellets that have been amalgamated into a single unit. It provides responsive cushioning throughout the gait cycle while also ensuring comfort, even when standing idly.

The TORSION® SYSTEM is a unit that holds the mid-foot in place and prevents it from wobbling as the runner performs. It is placed in the middle of the platform.


The fabric that’s used for the upper unit is called the Primeknit. This material is similar to woven cloth, so it delivers the feeling of actually wearing socks. It’s also able to accommodate natural airflow into the foot-chamber, thus delivering a cool and dry interior environment.

The mid-foot section of the upper features a Dynamic Arch design. It basically causes the upper unit to wrap around the arch, supporting it along with the whole top section of the foot. This unique design also elevates the look of the shoe.