Pearl Crown Rayon thread is a wonderful choice for decorative sewing and quilting techniques like couching and using in the loopers of a serger because it's shiny, strong, and comes in many bright colors. It is smooth, adding a glossy, professional look to the edges of fabrics. This thread is perfect for making your serged edges stand out with its beautiful shine and durability. It is not designed for machine sewing or quilting. It is for serger loopers or hand-stitched accents. It is wound on 100 yard spools and is hand washable, dry cleanable and colorfast.