adidas UltraBoost 21 'Tokyo' - White/Black - UK 11.5
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Product Information
Full details
The adidas Ultraboost 21 'Tokyo' is designed for adult male runners seeking enhanced performance and stability. Its key benefit is a highly responsive ride with superior cushioning, made possible by an increased Boost midsole. A potential caveat for some users might be the specific fit due to the Primeknit upper, which is engineered for a snug feel. This innovative running shoe features a Primeknit upper made from recycled ocean plastic and a full-length Boost midsole for maximum energy return.
All features
| Age Group | adult |
|---|---|
| Colour | White |
| Gender | Male |
| Material | Polyester |
| Shoe Size UK | 11.5 |
| Accent Colour | Black |
| Shoe Type | Trainers |
| Series | Ultraboost 21 |
| Model Part Number | S23863-115 |
| Brand | adidas |
Extended Product Information
FAQs
What makes the Ultraboost 21 'Tokyo' different from previous models?
The Ultraboost 21 'Tokyo' features 6% more Boost capsules in the midsole for enhanced energy return and cushioning. It also incorporates an updated Torsion System for improved stability and a Primeknit upper made with Primeblue, a recycled material.
Is the Primeknit upper waterproof?
The Primeknit upper is breathable and water-resistant to some degree, but it is not fully waterproof. It is designed to wick away moisture and provide ventilation.
Can I wear these shoes for activities other than running?
Yes, the excellent cushioning and comfort make the Ultraboost 21 suitable for walking, gym workouts, and general everyday wear.
How durable is the Boost midsole?
The Boost midsole is known for its exceptional durability and resistance to temperature changes, maintaining its cushioning properties over many miles.
How do I choose the right size?
Refer to the adidas sizing chart for accurate measurements. The Ultraboost 21 offers a snug, performance fit. If you prefer more room, consider sizing up half a size.
Are these shoes suitable for wide feet?
The Primeknit upper offers some flexibility, but the overall fit is designed to be snug. Users with wider feet may find them tight and should consider trying them on or ordering a half-size up.
What is Primeblue?
Primeblue is an innovative material made partly with Parley Ocean Plastic. It's a high-performance recycled yarn that helps reduce plastic waste in the oceans.
Troubleshooting
Shoes feel too tight or restrictive.
The Primeknit upper is designed for a snug fit. Try wearing thinner socks or loosening the laces. If the issue persists after a break-in period, consider alternative lacing techniques or if the sizing is appropriate for your foot width.
Midsole feels less responsive over time.
Ensure the shoes are clean, particularly the outsole, as debris can affect performance. While Boost technology is durable, prolonged heavy use will naturally lead to some decrease in cushioning. Proper care and avoiding extreme conditions can help maintain performance.
Primeknit upper shows signs of wear or pilling.
Avoid contact with abrasive surfaces. If minor pilling occurs, it can sometimes be gently addressed with a fabric shaver. Ensure proper cleaning techniques are used to avoid damaging the material.
Poor grip on wet surfaces.
While the Continental™ rubber outsole offers excellent grip, extremely slick conditions can still pose a challenge. Ensure the outsole is free of debris that might compromise traction.
Pros and Cons
Pros
- Exceptional energy return and cushioning from the Boost midsole.
- Breathable and adaptive Primeknit upper for a comfortable fit.
- Improved stability and smoother transitions.
- Durable outsole with excellent grip in various conditions.
- Environmentally conscious construction using recycled materials.
Cons
- The snug fit of the Primeknit upper may not suit all foot shapes.
- Higher price point compared to basic running shoes.
- May require a break-in period for optimal comfort.
- Primeknit can be susceptible to snagging on rough surfaces.
Setup, Compatibility & Care
The adidas Ultraboost 21 'Tokyo' requires no specific setup; they are ready to wear out of the box. Compatibility is primarily with your personal running style and foot shape.
Care Instructions:
- Cleaning the Upper: Gently clean the Primeknit upper with a soft brush and a mild soap solution. Avoid harsh scrubbing.
- Cleaning the Midsole: Use a damp cloth to wipe down the Boost midsole. For tougher stains, a magic eraser can be used with caution.
- Cleaning the Outsole: Remove dirt and debris from the Continental™ rubber outsole with a brush.
- Washing: It is generally recommended to hand wash these trainers. If machine washing is necessary, use a gentle cycle with cold water and place the shoes in a mesh laundry bag. Remove insoles and laces before washing.
- Drying: Air dry the shoes at room temperature, away from direct heat sources like radiators or sunlight. Stuffing them with paper towels can help absorb moisture and maintain their shape.
- Storage: Store in a cool, dry place when not in use.