adidas UltraBoost 20 Trainers - Blue - UK 4.5

While comfortable, the UltraBoost 20 is designed with performance in mind. They can be worn casually, but their advanced cushioning and support are best utilized for athletic activities like running and training.

Refer to the size chart provided by adidas or consult the specific sizing recommendations for this model. Generally, UK sizing for trainers can be found on the shoe's tongue or packaging.

The rubber outsole provides decent traction, but prolonged exposure to heavy rain may affect the materials over time. They are not waterproof, so use caution in very wet conditions.

The Boost midsole technology provides exceptional energy return, meaning it absorbs impact and returns it as energy, giving you a more responsive and comfortable feel with every stride.

The Primeknit upper is designed to be durable for athletic use, offering flexibility and breathability. However, it can be susceptible to snags or tears from sharp objects.

This partnership indicates that the shoe's design and technology have been tested and inspired by research conducted in space, aiming for enhanced performance and material innovation.

Clean them as needed, especially after strenuous activity or if they become visibly dirty. Regular gentle cleaning will help maintain their appearance and performance.

Ensure you are using a double knot when tying the laces. Check if the laces are worn out and consider replacing them with new ones.

The Primeknit upper may require a short break-in period. Wear them for shorter durations initially and gradually increase wear time.

While Boost is highly durable, extreme conditions can affect performance. Ensure the shoes are clean and free from debris that might impede the cushioning.

Clean the rubber outsole to remove any dirt or debris that might be hindering grip. For significantly wet conditions, exercise caution as with any footwear.