Polo headgear... Maltese style For the Duke of Edinburgh, a cloth cap (very comfortable fitting). The game was a fine afternoon out for the royal children, who watched Daddy play minus cloth cap. Duke of Edinburgh wearing a Maltese style cloth cap for his game of polo at Malta. The Royal children watched the game and saw their father drop his informal headgear as he went into action. May 10, 1954. (Photo by Daily Mirror).