Joan is our 2-ply Sock weight yarn, made from 80% Superwash Merino and 20% Nylon. This springy yarn is great for socks as well as sweaters and hats. 400 yards is 100 grams, and the mini skein is 80 yards and 20 grams. Knit 28 stitches equals 4 inches, use needle sizes US 0-3. Crochet 28 stitches equals 4 inches, use hooks B-C.