The Melvin Track is a durable, waterproof boot made from 70% natural rubber. It also features 30% rubber and beautiful fishskin details on the heel. It has a distinctive track sole that provides great comfort. The soft PU foam used on the insole makes it lightweight and shock-absorbing. Breathability is ensured with the WODEN airflow footbed and an outer sole based on our Natural Soft technology. This technology is designed to provide the best possible comfort, making the Melvin Track a comfortable and waterproof companion on the go. • rubber • Rubber sole with Natural Soft technology • Waterproof • Tread pattern sole for better grip • Fishskin detail • Cork insole with Airflow system.