On Cloudmonster 3 Trainers - Grey - Size: UK 7

Yes, the significant cushioning and responsive design make them well-suited for the demands of marathon running, providing comfort and energy return over long distances.

These shoes are optimized for road running. While they might handle very light, smooth trails, they lack the aggressive grip and protective features needed for technical off-road terrain.

Refer to the sizing chart provided by On Running and measure your foot. A good running shoe should have about a thumb's width of space between your longest toe and the end of the shoe.

The Cloudmonster 3 features an updated, even smoother CloudTec® Phase technology in the midsole for a more harmonious and less 'stuttering' ride, along with a refined Helion™ superfoam compound for enhanced energy return and durability.

Running shoes typically last between 300-500 miles (500-800 km). Factors like running surface, weight, and gait can affect lifespan. Replace them when you notice a significant decrease in cushioning or support.

The engineered mesh upper offers breathability and is not waterproof. They are designed for use in dry or mildly wet conditions, but not for heavy rain or deep water.

Loosen the laces and re-tie them, ensuring an even distribution of pressure. If the issue persists, consider if the size is correct or if the foot has swollen during the day.

This is common as shoes break in. Ensure socks are appropriate for running and that lacing is adjusted correctly. If discomfort continues after several runs, consult with a running shoe specialist.

The cushioning and foam may naturally compress with extensive use. For optimal performance, consider replacing shoes after 300-500 miles or when cushioning feels significantly diminished.