Product Information
Full details
The Adidas Ultraboost 21 'Tokyo' trainers are designed for adult male runners seeking enhanced performance and comfort on their runs. The key benefit is a highly responsive and stable ride, thanks to an increased Boost midsole and a snug Primeknit upper made from recycled materials. A potential caveat is that the focus on performance might mean a slightly firmer feel for those accustomed to softer cushioning.
All features
| Age Group | adult |
|---|---|
| Colour | White |
| Gender | Male |
| Material | Polyester |
| Shoe Size UK | 12.5 |
| Accent Colour | Black |
| Shoe Type | Trainers |
| Series | Ultraboost 21 |
| Model Part Number | S23863-125 |
| Brand | adidas |
Extended Product Information
FAQs
What makes the Ultraboost 21 'Tokyo' different from other Ultraboost models?
The 'Tokyo' edition features a design inspired by the city and an updated Boost midsole with 6% more Boost capsules for enhanced responsiveness and energy return compared to previous models.
Are these shoes suitable for wide feet?
The Primeknit upper offers an adaptive fit, but the overall design is snug. Individuals with very wide feet might find them too constrictive. It's recommended to try them on if possible.
How do I clean the Primeknit upper?
Gently clean with a soft brush and cold water. For tougher dirt, use mild soap and a damp cloth. Avoid machine washing or tumble drying.
What is the primary intended use for these trainers?
These trainers are primarily designed for road running, offering excellent cushioning and energy return for distances ranging from daily jogs to marathons.
Can I use these for gym workouts?
While comfortable, their design is optimized for forward motion on roads. For activities requiring lateral stability like weightlifting, dedicated training shoes might be more appropriate.
What is the benefit of the increased Boost capsules?
More Boost capsules translate to a more pronounced energy return, a softer landing, and a more responsive feel with each step, enhancing overall running performance and comfort.
Is the Primeknit upper made from recycled materials?
Yes, the Primeknit upper in the Adidas Ultraboost 21 'Tokyo' is made from recycled ocean plastic, contributing to a more sustainable product.
Troubleshooting
Shoes feel too tight
Ensure you have selected the correct size. Try wearing thinner socks or loosening the laces. The Primeknit upper may also stretch slightly with wear.
Reduced cushioning performance
The Boost midsole is designed for longevity, but performance can be affected by extreme temperatures or heavy wear. Ensure the shoes are clean and free from debris that might impede the midsole's function.
Upper material feels worn
The Primeknit upper is durable but can snag on sharp objects. Avoid abrasive surfaces. Gentle cleaning with a soft brush is recommended.
Pros and Cons
Pros
- Superior energy return with the Boost midsole.
- Comfortable and adaptive Primeknit upper.
- Sustainable materials used in construction.
- Provides excellent stability for a secure run.
- Durable construction for long-term use.
Cons
- May feel firmer than expected for some runners.
- The snug fit might not be ideal for wider feet.
- Primarily designed for road running, less suitable for trails.
Setup, Compatibility & Care
Setup: These are ready to wear straight out of the box. Ensure you have selected the correct UK size for optimal fit.
Compatibility: These trainers are designed for road running and general athletic activities. They are not specifically designed for trail running or heavy gym training.
Care Instructions:
- Cleaning: Use a soft brush or damp cloth to remove surface dirt. For deeper cleaning, hand wash with cold water and mild soap. Avoid machine washing or drying.
- Drying: Air dry the shoes away from direct heat sources. Stuffing them with paper can help absorb moisture and maintain shape.
- Storage: Store in a cool, dry place, away from direct sunlight.
- Socks: Wearing appropriate running socks is recommended for comfort and to help manage moisture.





