RED HEART-Roly Poly Yarn. Soft acrylic yarn in contemporary combinations perfect for babies, toddlers and kids. Fun cake-style balls are easy to use and you will love how the stripes appear as you stitch. Weight category: 4. Content: 100% acrylic. Putup: 3.5oz/100g, 374yd/342m. Gauge: 18sx23r = 4in/10cm on size US8/5mm knitting needles. Suggested crochet hook: I-9/5.5mm. Dyelotted: we try but are not always able to match dye lots. Care: machine wash warm gentle cycle. Tumble dry low, do not overdry. Do not iron, do not bleach. Comes in a variety of colors. Each sold separately. Imported.