SULKY-Cotton + Steel Thread Collection Wildflowers. This new Wildflower collection was inspired by the newest fabric offering from Rifle Paper for Cotton + Steel. This collection has 12 660 yard spools of 50wt Egyptian-grown, long-staple 100% cotton threads, which complements the newest collections from Cotton + Steel and many other inspiring fabric lines. Ideal for piecing, quilting and sewing. Imported.