The welt of a shoe, also called the "welt band" or simply "welt," is the strip of material (usually leather or rubber) that connects the upper part of the shoe (vamp) to the sole. Its primary function is to provide structure and durability to the shoe, in addition to adding an aesthetic touch in some styles.

What is the purpose of the welt?

The welt serves several important functions:

    Durability and Strength: It adds structure to the shoe, making the connection between the sole and the upper more durable.
    Stability: It provides additional support, better distributing the pressure of each step and helping the sole and upper stay firm.
    Aesthetic: The welt also adds a visual element, especially in high-quality, formal, or casual shoes, where a welt with contrasting color or design can enhance the shoe's appearance.