Naturallycaron.com Joy! Yarn. Super softness; joyful colors; and practicality combine in this medium weight bamboo blend yarn. Weight Category: 4. Content: 70% Acrylic; 30% Rayon from Bamboo. 2-1/2 ounces/138 yards per skein. Gauge: 18st x 23r = 4 inches/10cm on size US8/5mm needles or size H-8/5mm crochet hook. This yarn is dyelotted. Care: Machine wash warm on gently cycle. Tumble Dry low on delicate cycle. Imported.