Throw it back with this Boston Celtics Throwback Pennant 59FIFTY Fitted Hat from New Era The 59FIFTY design represents the pinnacle of fitted hats making this hat a must-have for any fan With its high crown and structured fit this hat delivers a timeless look that's perfect for showcasing your Boston Celtics pride New Era Kelly Boston Celtics Throwback Pennant 59FIFTY Fitted Hat Kelly Green - NBA Caps at Academy Sports