Finally have it done. It's worsted weight, but I'm not sure of the fiber content. The yarn was given to me rolled in balls. Feels like Acrylic. Sweated it out towards the end, I wasn't sure there'd be enough yarn. I found an error in the pattern for the shawl collar. I had to pick out the bind off, and make it longer, as it didn't fit the lapel. But...I'm done, and on with another sweater. FOR ME!!!!!