Nike React Infinity Run Flyknit 2 - Black - UK 5.5

This shoe is designed for runners seeking maximum cushioning and support for everyday training, long runs, and injury prevention.

Yes, the excellent cushioning and responsive feel make it a solid choice for marathon training and racing for runners who prefer a highly cushioned shoe.

Flyknit is an engineered knit that offers a more precise fit, better breathability in specific zones, and a lighter, more sock-like feel compared to traditional mesh.

While versatile, they are optimized for running. For cross-training or court sports, dedicated shoes are recommended due to differing support and stability needs.

The shoe should feel snug but not constrictive. There should be about a thumb's width of space between your longest toe and the end of the shoe. Ensure your heel is secure without slipping.

React foam provides a unique combination of softness and responsiveness, offering durable cushioning that helps reduce impact and return energy.

No, the Flyknit upper is designed for breathability and is not waterproof. They are best suited for dry conditions, though they can handle light moisture.

Ensure laces are loosened before putting on. If the issue persists, consider trying a half-size up or exploring models designed for wider feet. The Flyknit upper may also stretch slightly with wear.

Try re-lacing the shoes using a 'heel lock' technique, which involves using the extra eyelet near the ankle to secure the heel. Ensure the laces are tied tightly.

React foam is known for its durability, but all cushioning materials will eventually compress. If you notice a significant decrease in performance after extensive use (typically 300-500 miles), it may be time to consider a new pair.

Surface dirt can often be removed with a damp cloth and mild soap. Stubborn marks may require a soft-bristled brush. Avoid abrasive cleaners.