What is the purpose of using fabric underlining?

Using fabric underlining serves the primary purpose of providing additional support and structure beneath the main fabric layer of a garment. This technique enhances the overall stability of the fabric, which can be particularly beneficial for lightweight or delicate materials that may lack inherent strength.

Underlining helps to improve the way the garment drapes and fits by reinforcing the main fabric. It can prevent stretching and distortion during the construction process and wear, ensuring that the garment maintains its intended shape. Additionally, it can help manage the opacity of sheer fabrics, making them more wearable without adding bulk or altering their aesthetic.

While adding color, creating decorative effects, or making the fabric thicker and warmer are considerations that might be relevant in specific contexts, they are not the primary purposes of using underlining in garment construction. The focus is mainly on enhancing the garment's durability and overall performance through structural support.