Red Heart-Unforgettable Waves Yarn. Beautiful color ways in a thick and thin version of Unforgettable that will add a texture and dimension to your knitting and crocheting. Weight category: 4. Content: 100% Acrylic. Putup: 3.5oz/100g, 125yd/109m. Gauge: 16sx20r = 4in/10cm on size US8/5mm knitting needles. Suggested crochet hook size I-9/5.5mm. Dyelotted: we try but are not always able to match dyelots. Care: Machine wash, tumble dry low, do not bleach, do not iron, do not dry clean. Comes in a variety of colors. Each sold separately. Imported.