What is interfacing used for in sewing?

Interfacing serves an essential function in sewing by providing support, structure, and stability to various garment components. Specifically, it is used to give shape to areas like collars, cuffs, and facings, which helps in maintaining their form. Additionally, interfacing acts as a barrier to prevent stretching, ensuring that the outer fabric maintains its intended appearance and fit over time. This is particularly important in areas that experience a lot of wear and movement, as it helps the garment retain its shape and enhances its overall durability.

The function of interfacing is therefore crucial in achieving a professional finish and ensuring that the garment meets the intended design standards. It contributes to the strength of the fabrication while also supporting the aesthetic appeal of the finished product.