A double layer of cotton twill acts as wool to keep in the heat while letting out the body's moisture. Our full-length cloaks are machine washable, and are black reversible to either Hunter green, Navy, or Burgundy. They are a full half-circle and come with a hand-made, brass, authentic cloak pin. One size fits all -- even the very big and the very small. It might be a good idea to get an extra pin with your cloak -- just in case you lose the one that comes with the it.