Sewing a facing as a trim element is a technique that can be used to add a decorative edge to a garment. Facings can be made from many different fabrics, and they can be used to create a variety of looks. For example, a facing made from a contrasting fabric can create a bold, eye-catching look, while a facing made from a sheer fabric can create a more subtle, elegant look.
Facings can also be used to add structure to a garment. For example, a facing can be used to stabilize a neckline or to create a more polished look on a hem. In addition, facings can be used to hide raw edges and to prevent fraying.