Nike React Infinity Run Flyknit 3 - Black - Pink - Trainers - UK 6

Yes, the ample React cushioning and comfortable fit make it well-suited for the demands of marathon training, especially for long runs.

While comfortable for everyday wear, their design is optimized for running performance. For extended casual walking, you might find other Nike options more suited to that specific purpose.

Flyknit is a woven, yarn-based material that creates a lighter, more breathable, and sock-like fit that adapts to the foot's shape, whereas traditional mesh often offers more structured ventilation.

The Flyknit 3 features updated upper construction for improved fit and lockdown, along with increased midsole foam for enhanced cushioning and a more stable, wider base.

No, the Flyknit upper is designed for breathability and is not waterproof. They are suitable for dry conditions; avoid running in heavy rain or through puddles.

The lifespan varies based on mileage, running surface, and individual biomechanics, but typically running shoes offer optimal performance for 300-500 miles (480-800 km).

Ensure laces are loosened appropriately. The Flyknit upper is designed to be adaptive; with wear, it may offer a more personalized fit. If still too snug, consider trying a half-size up or a different lacing technique.

Verify the shoe size is correct. The arch support is integrated; if you require significant arch support, consider using aftermarket insoles designed for running shoes.

While React foam is durable, its peak responsiveness may decrease after extensive mileage. Rotate with another pair of shoes if possible to extend the life of the cushioning.