adidas UltraBoost 4.0 DNA Trainers - White/Black - UK 4.5

The Boost midsole uses thermoplastic polyurethane (TPU) pellets that expand to create a unique cushioning structure. It provides excellent energy return and shock absorption, making it feel responsive and comfortable.

Yes, Primeblue is an eco-friendly material made with at least 50% Parley Ocean Plastic, which is reclaimed plastic waste collected from beaches and coastal communities before it can enter the ocean. The rest is recycled polyester.

The UltraBoost 4.0 DNA is designed with superior cushioning and energy return, making it suitable for many runners, including those doing long distances. However, for competitive or high-mileage training, specialized running shoes might offer more targeted support.

The trainers should fit snugly, like a sock, without excessive pressure points. Your heel should feel secure, and your toes should have enough room to wiggle slightly. Consider the length and width of your foot when determining the best fit.

No, the Primeknit upper is breathable and designed for ventilation, not waterproofing. They are not suitable for wearing in heavy rain or wet conditions.

The 'DNA' designation typically signifies a lifestyle-oriented version of the original performance running shoe, often featuring updated designs or materials while retaining the core Boost technology and comfort.

Ensure laces are loosened before putting on. The Primeknit upper will stretch slightly with wear, but if the fit is consistently too tight, consider a half-size larger for future purchases.

This can sometimes occur due to moisture trapped between the insole and midsole. Try removing the insole and ensuring both it and the inside of the shoe are completely dry before reinserting.

Over time and with exposure to UV light, the Boost material can naturally yellow. This is cosmetic and does not affect performance. Regular cleaning can help slow this process.