What's there to say about Santa Claus (or "Father Christmas" if you're more Anglo-inclined or "Sinterklass" if you're a Dutchman) that doesn't border on redundancy? He's an international icon. There's probably kids in the Amazon who Santa Claus is used as a threat against if they're not good. The Adult Santa Hat Costume is emblematic outfit of that great, holiday icon.
This costume, the Adult Santa Hat Costume, is just that. It's a giant Santa Claus hat, one of the great symbols of the Christmas season (and, you know, of the actual holiday).