YLM991 Fusible Batting Seam Tape for Quilt Sewing,Single-Side Adhesive, Adhesive side is on the inside of the roll & rough,iron side is Warp-Knitted Stretchy Fabric,comfortable to touch,Each roll is 1.5inch wide,20yd long,easily activated with an iron,Apply the tape to the wrong side of the fabric, ensuring the adhesive coating (shiny side) is facing down. Avoid direct heat contact with the interfacing and cover it with a cotton cloth when ironing,Always do a test before applying it to the actual project. Suitable for use with materials including cotton, polyester, and blends, it offers versatility and compatibility for a wide range of projects. Whether you're repairing damaged areas of quilts, reinforcing clothing, or adding extra padding, this fusible batting tape is a reliable addition to your crafting toolkit