interlining

This term is a technical specification used primarily in garment construction and tailoring. It refers to a hidden structural layer that differs from the lining, which is the visible interior fabric that protects the interlining and provides a smooth finish against the skin.

In professional tailoring, the choice of interlining determines the garment's silhouette and durability. It is often used in high-stress areas like collars, cuffs, and waistbands to prevent sagging or collapsing over time.