Used to ensure stronger adhesion with the upper, it is typical of the sneaker

The “anatomy” of a shoe is highly complex, composed of many different parts with sometimes rather “exotic” names. But basically, a shoe is made up of two main elements: the upper, the part of a shoe above the sole, and the bottom stock, or underside of the shoe, comprising a number of elements between the foot and the ground. Joining the upper to the bottom of the shoe, called fixing in technical terms, is very often one of the most important steps in the construction of a shoe, and can be done in a number of ways.
When the shoe’s bottom stock has projecting edges, it is possible to use box sole stitching, or welting. Used principally for sneakers, but also for morE formal shoes, this construction method consists of sewing the bottom to the upper in such a way as to ensure excellent toughness and durability and reduce the risk of the upper coming away from the sole.
In the photo gallery below, some examples of Italian shoes with box soles.