fusible featherweight interfacing  :: https://dndfabrics.com/  

Fusible Featherweight Interfacing is ideal for light fabrics, providing gentle support and stability without adding bulk. Perfect for collars, cuffs, facings, and delicate garments, it fuses easily with a warm iron. This lightweight interfacing ensures a smooth, professional finish, making it a go-to choice for refined sewing projects and garments.