Nike React Infinity Run Flyknit 3 - Black - Trainers - UK 12.5

These shoes are primarily designed for neutral runners who need cushioning and stability for everyday training and long runs.

Nike React foam is engineered to be lightweight, durable, and provide a soft yet responsive cushioning experience that helps absorb impact.

The Flyknit upper offers a breathable, flexible, and supportive fit that adapts to the foot, similar to a sock, reducing irritation and enhancing comfort.

The shoe is designed for neutral runners. While it has a wider base for stability, it may not provide adequate support for runners who significantly overpronate. Consulting a running specialist is recommended for personalized advice.

Gently clean with a damp cloth and mild soap. Avoid machine washing and ensure they air dry naturally away from direct heat.

Yes, while they provide ample cushioning for long runs, the responsive nature of the React foam also makes them suitable for moderate paces and some speed work.

The lifespan of running shoes varies depending on usage, terrain, and runner's weight, but typically, running shoes are recommended to be replaced after 300-500 miles (480-800 km) of use.

This can sometimes occur with new shoes. Try running in them a few times; the noise often dissipates. Ensure the laces are not tied too tightly, which can sometimes cause this.

Ensure you have the correct size and width. Adjust the lacing system to achieve a more personalized fit. Consider wearing them for shorter periods initially to allow your feet to adapt to the Flyknit upper.

Check the rubber outsole for embedded debris (stones, mud) and clean them. Ensure you are running on appropriate surfaces; the outsole is designed for roads and moderate trails.

While the Flyknit is designed for a snug fit, try loosening the laces, particularly around the midfoot and forefoot areas. If discomfort persists, this specific fit might not be ideal for your foot shape.