Red Heart-Boutique Midnight Yarn. This medium weight yarn is perfect for all knit and crochet projects. Weight category: 4. Content: 65% Acrylic/23% Wool/6% Metallic Polyester/6% Nylon. Putup: 2.5oz/70g, 153yd/140m. Gauge: 16sx22r = 4in/10cm on size US10/6mm knitting needles. Suggested crochet hook size J10/6mm. Dyelotted: we try but are not always able to match dyelots. Care: hand wash, dry flat, do not bleach, do not iron, dry clean with P solvents only. Comes in a variety of colors. Each sold separately. Imported.