Nike ReactX Infinity Run 4 - Blue - UK 7

The ReactX foam offers enhanced responsiveness and cushioning compared to previous Nike foams, designed to reduce energy loss and improve comfort during runs.

Yes, the ReactX Infinity Run 4 is designed with significant cushioning and support, making it well-suited for long-distance events like marathons.

These shoes are primarily designed for road running. While they may offer some grip on light trails, they lack the aggressive tread and protection typically found in dedicated trail running shoes.

You should have about a thumb's width of space between your longest toe and the end of the shoe. The fit should be snug in the heel and midfoot, with enough room in the toe box for your foot to expand naturally during a run.

The lifespan of running shoes varies based on usage, running surface, and individual biomechanics, but typically ranges from 300-500 miles (480-800 km). Look for signs of wear like flattened cushioning or worn-out tread.

Gently brush off dry mud with a soft brush. For tougher dirt, use a damp cloth with mild soap and water. Avoid using harsh chemicals or placing them in a washing machine.

This specific guide focuses on the 'Light Armory Blue Green' colorway. The React Infinity Run series often features a range of color options across different releases and sizes.

Ensure the laces are adjusted correctly. Try different lacing techniques. Break in the shoes gradually with shorter runs.

The foam may naturally compress with use. Ensure the shoes are clean and free from debris that could affect performance. Consider replacing them after significant mileage, as per typical running shoe lifespan.

The outsole is designed for dry to damp conditions. For very wet or slick surfaces, exercise caution. Ensure the outsole is clean, as mud or debris can reduce traction.