What is Interlining?

Interlining or underlining, a fabric layer interjected between two fabric layers, is an important element in various garments like clothing, including jackets, coats, suits, skirts, and dresses that helps them with reinforcement, warmth, and structure.

Interlining can be produced using a wide range of materials, including synthetic fibers, silk, wool, and cotton. The choice of interlining depends on the purpose of the garment, the fabric used, and the desired level of warmth, thickness, and durability.

The two types of interlining are sew-in and fusible. The former is attached to the primary fabric via stitching, either by machine or by hand, and the latter is fused to the primary fabric using heat activation on one side of the interlining, where it sticks to the primary fabric.

Interlining serves different functions, like providing structures to garments such as suits and skirts. It can also serve as an insulator, like in a winter coat or a quilted jacket. Additionally, it can reinforce areas of garments that undergo stress like waistbands, cuffs, and collars.