adidas Ultraboost 5 Trainers - White/Silver - Size UK 5

Yes, the Ultraboost 5 offers excellent cushioning and energy return, making them suitable for marathon distances. However, personal preference for cushioning and support varies among runners.

Refer to the adidas sizing chart. The shoes have a regular fit, and the PRIMEKNIT upper adapts to your foot. It's often recommended to try them on if possible.

No, machine washing is not recommended as it can damage the shoe's materials and construction. Hand wash with a damp cloth and mild soap, then air dry.

The Torsion System provides midfoot stability, allowing the forefoot and rearfoot to move independently. This enhances stability and control during your stride.

The inclusion of at least 20% recycled materials is part of adidas's sustainability efforts and does not negatively impact the shoe's performance. The core technologies like Boost and Torsion System remain central to the design.

Primeknit is a woven textile material that offers a sock-like fit, flexibility, and breathability. It's designed to adapt to the foot's shape for enhanced comfort compared to more rigid materials.

Loosen the laces and re-tie them, ensuring they are not overly tight. If still uncomfortable, consider the fit of the PRIMEKNIT upper which can be snug.

The Boost midsole is designed to maintain its properties over time. Ensure the shoes are clean and dry, as dirt and moisture can affect perceived performance.

Check that the outsole is clean and free from debris. Ensure the shoes are laced securely for a proper fit. The rubber outsole provides grip on most surfaces, but performance may vary on very wet or slick conditions.