adidas Ultra Boost 21 Tokyo - White - Size 8.5

The Ultra Boost 21 features a more significant amount of BOOST cushioning compared to earlier models, an improved Continental™ Rubber outsole for enhanced grip, and a refined Primeknit+ upper for better support and comfort. The overall design is optimized for maximum energy return.

The 'Tokyo' edition primarily features a unique colorway and design elements inspired by the city. The underlying technology and performance features, such as the Ultra Boost cushioning and Primeknit upper, remain consistent with the Ultra Boost 21 model.

The shoe should feel snug but not tight, with enough room in the toe box for your toes to wiggle slightly. The heel should feel secure without slipping. Refer to the adidas sizing chart for precise measurements.

While exceptionally comfortable and supportive for running, the Ultra Boost 21 can also be suitable for activities like walking or gym workouts. However, for sports requiring lateral stability, like tennis or basketball, specialized shoes are recommended.

BOOST cushioning is known for its exceptional durability and ability to maintain its responsiveness over many miles. However, like all shoe materials, it will eventually show signs of wear with extensive use.

The upper is constructed from Primeknit+, a soft and breathable, sock-like material that offers a comfortable and adaptive fit.

Wear the shoes for short periods initially to allow the Primeknit upper to stretch and adapt to your foot shape. Ensure you have selected the correct UK size.

While BOOST technology is durable, consistent use can lead to a perceived reduction in responsiveness. Ensure the shoes are clean and free of debris that might affect performance. Consider rotation with another pair of shoes to extend their lifespan.

The outsole provides good traction on dry surfaces. For wet conditions, exercise caution as with any athletic shoe. Ensure the outsole is free from mud or debris.