Interfacing is a fabric used to provide structure and support to parts of a garment such as collars, cuffs, and plackets. Two main factors influencing the selection of interfacing fabric are:
Fabric Weight and Texture: The interfacing should be compatible with the main fabric’s weight and texture to maintain the garment's look and drape. For example, a lightweight fabric requires a lightweight interfacing.
Purpose and End Use: Depending on whether the interfacing is for shaping, reinforcing, or stiffening, different types (woven, non-woven, fusible) are selected to achieve the desired effect.
Other factors include ease of sewing, color matching, and durability.