Nike ReactX Infinity Run 4 - Trainers - UK 9

It is recommended to measure your foot length from heel to toe and compare it with the Nike sizing chart. As sizes may vary slightly, precise measurement is key.

The Nike ReactX Infinity Run 4 is primarily designed for road running. While the outsole offers some grip on light trails, it is not specialized for technical off-road terrain.

For optimal performance and injury prevention, running shoes typically need replacement every 300-500 miles (480-800 km) or when you notice significant wear on the outsole or cushioning.

While comfortable, these trainers are optimized for running. For gym workouts, especially those involving heavy lifting or lateral movements, a shoe with a more stable and flatter base might be more appropriate.

ReactX foam is engineered to provide even greater energy return and improved sustainability compared to previous versions of Nike's React foam, offering a more responsive and environmentally conscious ride.

This specific guide focuses on the white colourway. Please refer to product listings for other available colours and variations.

Ensure you have selected the correct size by measuring your foot length. Break in the shoes gradually with shorter runs before attempting long distances.

While ReactX foam is durable, consistent high-mileage use will eventually reduce its responsiveness. Consider replacing the shoes after significant wear.

The outsole provides good traction on dry surfaces. Exercise caution when running on very wet or slippery conditions, as with any running shoe.