Red Heart Nylon Crochet ThreadRed Heart Nylon Crochet Thread is 100% nylon, size 18 crochet thread. Crochet nylon for home decor items, apparel, purses, apparel and other projects. 100% nylon crochet thread. Size 18. 150 yards. Machine wash gentle, no bleach, dry flat. Comes in a variety of colors. Dyelotted. Each sold separately. Imported.