Updates to Adidas Ultraboost Uncaged Parley

  • The Adidas Ultraboost Uncaged Parley is a running shoe that’s created for those who have neutral foot pronation. Its design is largely similar to the original Ultraboost Uncaged; the only difference being a knitted heel counter instead of a separate plastic one.
  • The main change to this reliable neutral shoe is the use of a specialized yarn that’s developed by Parley for the Oceans. Used in the upper unit, it basically substitutes the regular Primeknit material, yet it retains the sock-like disposition. The material itself is made from recycled plastics.
  • The Boost technology graces the Adidas Ultraboost Uncaged Parley. This popular mid-sole foam unit aims to provide comfortable cushioning and responsiveness to every step. Protecting this foam from wear and tear is a rubber layer that’s crafted by the Continental™ company.

Size and fit

The Adidas Ultraboost Uncaged Parley is half-a-size smaller than the regular running shoe length. It is recommended to try this shoe out first in order to get a more relaxed fit, or get half-a-size to a full-size larger. It is available in the standard width.


The outsole unit of the Adidas Ultraboost Uncaged Parley is made from Continental™ rubber. It delivers reliable grip on both dry and wet surfaces. It also protects the mid-sole foam from the abrasive nature of the pavement.

The Stretchweb design makes sure that the natural flexibility of the foot is not hindered. Its design is similar to a grid or a web, which generously balances protection, traction and flexibility.


The mid-sole unit of the Adidas Ultraboost Uncaged Parley makes use of the Boost technology, which is one of the core proprietary features in the brand’s lineup of footwear. Made up of thousands of cushioned pellets that have been molded together, it delivers responsive cushioning and a soft underfoot experience.

The Torsion System is a midfoot steadying system that supports the underfoot and prevents it from getting injured. It’s a useful addition for people who want to wear this shoe for long periods of time.


The Adidas Ultraboost Uncaged Parley’s upper unit still features the Primeknit, which is a knitted material that looks and feels like a sock. But for this iteration, Adidas collaborated with Parley for the Oceans, an organization for the environment, to employ a yarn that’s crafted from plastics. The upper unit of this shoe is essentially woven from recycled materials.

Contrary to the previous version’s heel counter, the one that’s present in this model is made from the same material that graces the rest of the upper. It’s not a hard-plastic unit that’s separate from the shoe, but a thin mesh that’s stitched onto the back. It holds the foot in place and prevents it from coming off of the shoe accidentally.

The garter collar encompasses the foot like a sock. There is no traditional tongue unit in this running shoe.

A standard lacing system helps the rest of the upper unit in terms of hugging the foot and securing it. Additional eyelets that are reinforced with thin, printed overlays offer more options for how the wearer decides to adjust the fit.


How Adidas Ultraboost Uncaged Parley ranks compared to all other shoes
Top 2% road running shoes
All road running shoes
Top 2% Adidas running shoes
All Adidas running shoes
Top 2% neutral running shoes
All neutral running shoes


The current trend of Adidas Ultraboost Uncaged Parley.
Compare to another 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.