Nike React Infinity Run Flyknit 3 Trainers - White/Silver - UK 7.5

Yes, the React Infinity Run Flyknit 3 provides excellent cushioning and comfort, making them suitable for the demands of marathon training.

While primarily designed for running, they can be used for lighter cross-training activities. However, for intense gym workouts or sports requiring lateral support, dedicated cross-training shoes are recommended.

Refer to Nike's official sizing chart and measure your foot. The Flyknit upper offers some flexibility, but a snug, true-to-size fit is crucial for performance and comfort.

No, the Flyknit upper is designed for breathability and is not waterproof. They are suitable for dry to slightly damp conditions.

With proper care and regular use for running, the Nike React Infinity Run Flyknit 3 typically lasts between 300-500 miles (approx. 500-800 km). This can vary based on running style, surface, and maintenance.

In most Nike running shoes, the insoles are not designed to be permanently removed. They are usually glued or stitched in place. However, if you need to use custom orthotics, they can often be placed over the existing insole.

The Flyknit upper is designed to stretch and adapt. Wear them for shorter periods initially to allow them to mold to your foot shape.

The React foam is durable, but cushioning can feel less pronounced after extensive mileage. Ensure you are cleaning them properly to maintain material integrity.

While the outsole offers good traction, performance on extremely wet or slick surfaces may be reduced. Exercise caution in such conditions.

Ensure the laces are tied correctly to secure the heel. If discomfort persists, consider trying different sock thicknesses or ensuring the correct shoe size.