Aunt Lydia's Iced Bamboo Crochet Thread Size 3 Made of bamboo from viscose, this fabulous crochet thread is an earth friendly, sustainable and renewable resource that is naturally antibacterial with a recycled core and label. Made of 96% viscose from Bamboo, 4% Metallic. Size 3. Putup: 100yd (91.4m). 1.86 oz. Suggested Crochet Hook: D3 or E4. Care: machine wash gentle cycle, warm water, no bleach, rinse well, promptly remove, roll in towel and block. Coats & Clark.