This fantastic sock yarn is 75% Superwash Merino Wool, and 25% Polyamide (Nylon). Durable and soft, this yarn is perfect for your next pair of socks! There are 433 yards per 100 gram skein, and Huasco Sock knits with 27-32 stitches per inch on US 1-3 needles. Machine wash cool, lay flat to dry, do not use bleach.