Nike ReactX Infinity Run 4 Phantom - White - UK 6.5

ReactX foam offers enhanced energy return and a softer feel compared to previous Nike React foams, while also reducing the carbon footprint of the foam's production.

Yes, the cushioning and support are designed for long-distance running, making them suitable for marathon training and racing.

It is not recommended to machine wash these shoes, as it can damage the materials and affect their performance. Hand wash with a soft brush and mild soap, then air dry.

The ReactX Infinity Run 4 features the new ReactX foam for improved cushioning and sustainability, along with updates to the upper and overall stability.

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

These shoes are designed to offer stability and support, making them suitable for neutral runners or those with mild overpronation.

The outsole is constructed with durable rubber designed for traction and longevity, intended to withstand significant mileage under normal running conditions.

Ensure you have the correct size. Try wearing them for shorter durations initially to allow the materials to break in. Adjust lacing to find a more comfortable fit.

The foam may need time to reach its optimal performance level. Ensure the shoes are clean and dry, as excessive moisture or dirt can affect cushioning. Over time, all cushioning will naturally degrade.

Check the outsole for excessive wear or debris. Clean the outsole thoroughly. If the wear is significant, it may be time to consider replacement.

Loosen the laces, especially around the midfoot. The engineered mesh is designed to be adaptive; ensure it's not being overly compressed by tight lacing.