Headgear

Look at Gambit, the Creol X-Man. Now, answer me, WHAT IS THAT THING ON HIS HEAD? It's not a hat, cuz it doesn't cover the top of his head. It's not a mask, cuz it's got a giant face hole. It's not even a visor, cuz it won't keep the sun outta his eyes. WHAT IS IT? Why does he wear it?! *Confused.*