This is a true moebius cowl and requires a unique cast on, The pattern contains a link to a very user-friendly YouTube video of a way to do that cast on. If you’re familiar with the long tail cast on this link will be perfect for you. Lion Brand classifies Shawl in a Ball as a worsted weight yarn. I think it works up more like a sport weight. One ball will make four of these cowls using a 40” long US 10 circular needle. Shawl in a Ball colors come with two choices. My favorite is the one with the metallic thread used in this pattern. The larger needle and the finer weight yarn make for a graceful drape. If you choose an alternate yarn make sure it’s similar in weight.