Valdani Pearl Cotton is Colorfast and always hand-dyed. It is perfect for embroidery, crochet, wool applique, embellishment, quilting, rug hooking, and fringe making! Size 8 - The Medium Weight - Can be used in machine quilting and stitching for bobbin work. Also wonderful for Stitching, Hand Quilting, Appliqué, Crochet, heavier Punchneedle, and Rug-Hooking.