I have introduced the main three properties of polyurethane. Polyurethane soles not only reduce runner fatigue, but also bring environmental benefits. Today, this material is also becoming more and more popular in other fields, for example, polyurethane foam is used to make insulation materials for household refrigerators, polyurethane hard foam is the material of choice for insulation buildings. But I must admit that there are limitations to this material, for example, it is less flame retardant than natural rubber. Overall, however, it has more advantages and can provide a good running experience for runners. We look forward to more research and improvements by scientists.
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