Pellon 865F Bi-Stretch Lite Interfacing 20″ x 10 yards Bolt. Color: White. Fiber Content: 100% Polyester. Application Method: Fusible. Bi-Stretch Lite is a lightweight, woven, two-way stretch interfacing. It is sheer and silky, offering a luxurious hand and soft support in blouses, dresses, and lightweight suit fabrics. Bi-Stretch Lite fuses easily to hard-to-fuse fabrics such as rayon and acetate.