Thermoplastic rubber (TR-sole)
This synthetic rubber, which is stronger and durable than natural rubber, but no less elastic.
Thermoplastic rubber has a low density, so the soles of this material are light. In thermoplastic rubber there are no through pores, therefore external moisture through it does not pass. However, there are surface pores in this material, and they provide high thermal protection. It is a resilient material that provides good cushioning properties.It is a resilient material that provides good cushioning properties, so relieves unnecessary strain on the legs and spine.
However, in wet and frosty weather, the outsole of thermoplastic rubber slides strongly.