Reebok Nano X5 Trainers - Grey/Red - Size: 3.5

While the Nano X5 offers improved runnability with its responsive forefoot and decoupled outsole, they are primarily designed as cross-training shoes. For dedicated marathon running, specialized running shoes would offer better long-distance cushioning and support.

Refer to the sizing chart provided by Reebok and measure your foot length. Ensure a snug fit, especially around the heel, but not uncomfortably tight. The UK sizing is listed in the product details.

The shoes are not waterproof. While the rubber outsole provides some grip, wearing them in wet conditions is not recommended as it can affect the leather upper and traction.

The Nano X5 focuses on enhanced comfort through a redesigned dual-density midsole and a plush collar, along with an improved Metasplit outsole for better runnability, marking an evolution for the 15th anniversary.

The leather upper is designed for durability in training environments. However, like all leather products, it benefits from proper care to maintain its condition and longevity.

The product description does not specify removable insoles. However, many trainers allow for the removal of standard insoles to fit custom orthotics. It is recommended to try carefully removing the existing insole.

Ensure you have selected the correct size. If new, the leather may require a break-in period. Wear them for short durations initially and gradually increase wear time.

Check the outsole for embedded debris or excessive wear. Clean the outsole thoroughly. If heavily worn, consider replacement.

Try a double knot or consider replacing the laces with a pair that offers better grip.

This can sometimes occur with new shoes. It may resolve with use. If persistent, check for any foreign objects trapped between sole layers or lace friction.