A sole is the underside of the shoe. Sometimes, also referred to as the outsole of the shoe, this part comes directly contact with the ground. The sole of the shoe is often the part that wears out first, but some shoes can be re-soled by a shoe repair shop.
Soles can be made of a variety of materials like leather, rubber etc. Before the 20th century, shoes were made exclusively of leather. Since the 70s, shoes made of plastic, rubber and synthetic materials made from petrochemicals came into fashion. Comfort and affordable prices increased t... Read More...