adidas UltraBoost 21 'Tokyo' - White - UK 9.5

The Boost midsole provides exceptional energy return and responsive cushioning, helping to reduce fatigue and enhance performance during runs.

The Primeknit upper is designed to be comfortable and adaptive. While made from recycled plastic, it is intended for running use. For longevity, avoid abrasive contact and clean as per care instructions.

The Continental Rubber outsole offers superior grip in both wet and dry conditions, providing reliable traction and durability for various running surfaces.

Yes, the UltraBoost 21 Tokyo is well-suited for marathon training due to its superior cushioning and energy return, which helps manage impact over long distances.

The 'Tokyo' edition often features specific colorways and design elements inspired by the city, while retaining the core performance technology of the UltraBoost 21 series.

The UltraBoost 21 generally offers a snug, sock-like fit due to the Primeknit upper. It's recommended to try them on if you have wider feet or prefer a looser feel.

While the outsole provides good grip, these shoes are primarily designed for road running. They can handle light, well-maintained trails but may not offer the support or protection needed for technical off-road terrain.

Ensure laces are loosened before putting on. If the issue persists, consider trying a half-size larger or a model with a wider fit. The Primeknit upper does offer some stretch over time.

The Boost midsole is designed for long-term performance. Over time, heavy use can slightly reduce its properties, but this is typically after hundreds of miles. Ensure the shoes are clean, as debris can sometimes affect feel.

Check the Continental Rubber outsole for excessive wear or trapped debris. Clean the outsole with water. If wear is significant, it may be time to consider replacement.

Ensure socks are worn to prevent direct friction. The Primeknit is designed to mold to the foot; wear them for short periods initially to allow them to break in.