How does the hat work? And is it possible to just get the hat instead of the whole costume?

Hello, this is my fourth costume from you, I am extreamly happy with it. The quality is amazing as always and everything is as show in the pictures. They changed the colour of the vest from white to cream when I asked. The costume is comfortable to wear the only problem it was the zip on the side, it is rather awkward to open and close. Over all the costume is perfect in every aspect thank you ^^