Not every fabric benefits from additional structure. Some materials are specifically designed to be soft, fluid or flexible, and adding a stable support layer can change the way they were intended to look and move. Woven fusible interlining is generally better suited to fabrics that can accommodate additional structure, such as suiting materials, heavier polyester blends, brocades and certain cotton fabrics. It may not be the right choice for extremely lightweight or sheer materials where even a light support layer could make the finished garment appear stiff. Stretch fabrics also require careful consideration. Fabrics containing spandex or other stretch fibres are designed to move with the wearer, while woven reinforcement is comparatively stable. Combining the two without testing can restrict movement or create stress around the bonded area. Sheer fabrics such as chiffon and georgette can face a different problem because the reinforcement may become visible or affect their nat...