Product Details + Butterfly Organic Self Striping - Wonderfully Cushy!85% SW Organic U.S. Wool, 15% NylonSpun & Dyed in the U.S.Machine washable Wool & NylonWeight 100 grams, 425 ydsWill make 1 large pair of socks#0-2 ndls 7-9 st per inMachine wash cold, hang to dry or toss in dryer.