MERINO NYLON SOCK YARN is the most durable from all of our sock yarns because of the fiber blend: 75% Merino wool / 25% Nylon super wash. 3.5 oz. skein, 435 yards, 7-8 stitches per inch on # 1-3 needle. One skein knits up a pair of socks. All colors are bright and vibrant.