This 103 Bi Stretch Interfacing is made out of a polyamide yarn and the product is of a fusible knitted construction designed to have extreme elasticity. For use on fine fabrics and jersey. Knit interfacing has some crosswise stretch and minimal lengthwise stretch, so it can move with your fabric as it prevents it from stretching too much. It's ideal for knits, but it's also great for lightweight woven fabrics with some stretch and drape, like rayon. Press the iron on step-by-step for about 8 seconds, using a damp cloth. Do not push. We recommend performing application tests before processing the product . Machine washable at 30 degrees (once applied to main fabric). With a soft and elegant handle, the interfacing provides elasticity on both the warp and the weft. It is ideal for use on large or small parts of elastic high-class outer fabrics e.g. Jerseys etc.