The Embellish Fusible Underlay, available on a convenient 30" x 25-yard bolt, is the perfect addition to any sewing or embroidery project. Fusible Underlay is a sheer, fusible, premium interlining used to upgrade and protect the integrity of embellished fabric. This product is not a stabilizer; instead, it is underlining that creates a bond with the fabric, forming a protective barrier without changing the drape of the fabric. It adds substance to specialty and loosely woven fabric (lamé, loosely woven cotton, silk, satin, taffeta, etc.) to prevent needle penetration from shredding or causing runs in the fabric. It works great as a protective layer to seal the bobbin thread to prevent scratching on onesies and t-shirts. Once fused, it forms a permanent bond with the fabric. Fusible Underlay is made of a premium polyester/rayon proprietorial blend that is super soft and won't irritate the skin.