Back To Back World War Champs is a Federally Registered Trademark: 4528328 58 Cm This is the most perfect hat ever made. It is very high quality and durable. The colors are right out of the early 80's. It is the perfect truckers hat. Snapback unisex-adult Snapback closure in back Back To Back World War Champs cap is the kind of cap that every proud American should wear. Let the world know America is the undisputed back to back world war champ. It is brand new, never worn.