adidas 4Dfwd X Strun - Grey - UK 6.5

The 4D midsole uses a lattice-like structure generated from decades of runner data. It is engineered to precisely support the foot and translate landing forces into forward motion, creating a unique propulsive feel and smoother stride.

Yes, the propulsive nature of the 4D midsole can be beneficial for marathon distances by potentially reducing fatigue and aiding forward momentum. However, personal comfort and experience with the shoe are key.

While they offer good grip and comfort, the primary design is for running. For weightlifting or intense cross-training, shoes with a flatter, more stable sole might be preferable. They are suitable for light gym activities.

The trainers feature a sock-like cuff for a snug fit. Ensure there is a thumb's width of space between your longest toe and the end of the shoe. The fit should feel secure around the midfoot and heel without being constrictive.

Warranty information typically varies by retailer and region. Please refer to the point of purchase or the official adidas website for specific warranty details applicable to your purchase.

Use a damp cloth or a soft brush with mild soap and cold water. Avoid submerging the shoe or using harsh chemicals. Ensure it's air-dried completely away from direct heat.

Ensure the outsole is clean and free from debris. While designed for anti-slip, extreme wet conditions can reduce effectiveness. Consider alternative footwear for exceptionally slippery surfaces.

The 4D midsole may require a short break-in period. Wear them for shorter runs initially and gradually increase mileage. Ensure the lacing provides a comfortable yet secure fit, adjusting as needed.

Ensure you are tying a secure knot. Double-knotting may provide extra security. Consider replacing the original laces with ones that offer better grip if the issue persists.