My husband bought this for himself on Amazon (via a third party seller)and he absolutely LOVES IT. According to him, it is comfortable from the "get go" with no "break-in" period needed. In contrast, I had to wear my new tennis shoes around the house for several days to "break" them in ! The sole is made of Crepe rubber which is 100% natural and very durable. It has instantly become his favorite pair of shoes. Plus, it is stylish too which is an added bonus as most people would buy it just based on comfort alone. Great Shoes !