adidas Ultra Boost 21 - Trainers - Black - White - UK 9
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Product Information
Full details
The adidas Ultra Boost 21 Oreo is designed for runners and sneaker enthusiasts who demand a blend of high-performance cushioning and modern aesthetic appeal. Featuring the signature Boost midsole technology, these trainers provide exceptional energy return and comfort for daily training or casual wear, though runners with specific stability needs should note the neutral design.
All features
| Age Group | adult |
|---|---|
| Colour | Black |
| Gender | Male |
| Shoe Size UK | 9 |
| Accent Colour | White |
| Shoe Type | Trainers |
| Series | Ultra Boost 21 |
| Model Part Number | S23708 |
| Brand | adidas |
Extended Product Information
FAQs
Are these shoes suitable for long-distance running?
Yes, the Boost 21 is specifically engineered for distance running, providing ample cushioning for high-mileage comfort.
Can I use these for gym workouts?
They are ideal for treadmill running and light cardio, though they are primarily performance running shoes rather than lifting shoes.
How does the sizing fit compared to other brands?
The Ultra Boost series generally runs true to size, but the sock-like fit of the Primeknit upper means it can feel more snug than traditional trainers.
Is the material waterproof?
No, the Primeknit material is designed for maximum breathability and is not waterproof.
How often should I replace these running shoes?
It is generally recommended to replace running trainers every 300 to 500 miles, depending on your running style and surface conditions.
Troubleshooting
Knit upper shows signs of dirt or staining
Spot clean the affected area using a soft brush, warm water, and mild laundry detergent. Avoid putting them in the washing machine.
Sole grip feels slippery on wet surfaces
Check for debris or small stones lodged in the tread patterns of the Continental rubber and clear them away.
Feeling discomfort or pressure on the top of the foot
Loosen the lacing system near the midfoot to allow the Primeknit upper to expand according to your foot volume.
Pros and Cons
Pros
- High energy return and superior cushioning
- Breathable and adaptive Primeknit material
- Excellent grip on various terrains via Continental rubber
- Stylish and versatile black and white aesthetic
Cons
- Neutral support profile may not suit overpronators
- Specific knit pattern might require careful cleaning
- Higher profile midsole might feel bulky to some runners
Setup, Compatibility & Care
To ensure the longevity of your adidas Ultra Boost 21 trainers, keep them away from harsh chemical cleaners that could damage the knit upper. For everyday maintenance, remove surface dirt with a soft brush and clean the midsole with a damp cloth and mild soap. When not in use, store your shoes in a cool, dry place away from direct sunlight to prevent material degradation. The Primeknit upper is designed to be form-fitting; if you prefer a looser feel, consider wearing thinner socks for a better experience.