Iron-on Interfacing for Knits, Thin, 3m Iron-on Single-Sided Interfacing For General Fabrics For Knits Nylon. Polyester Transparency: As shown in the photo. Thickness: Thin, like a stocking Color: Off-gray Width: Approximately 113cm ♡ The interfacing base fabric is lightweight and has excellent horizontal stretch. Because it is stretchy, it can also be used for knit fabrics. Simply applying it to the entire fabric makes it less likely to wrinkle, prevents fraying, and helps maintain beautiful shapes and lines.