New York Yankees 27x World Series Champions New Era 59Fifty Fitted Hat (Glow in the Dark Navy Green Under Brim) New York Giants Oakland Athletics BATTLE OF THE

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New York Yankees 27x World Series Champions New Era 59Fifty Fitted Hat (Glow in the Dark Navy Green Under Brim) New York Giants Oakland Athletics BATTLE OF THENew York Yankees 27x World Series Champions New Era 59Fifty Fitted Hat in Navy & Green Under Brim. Logo: Glow in the Dark 100% Polyester How to make Patch Glow in the Dark: Simply Expose Logo to Sunlight (or bright light) for at least one full minute to activate the green phosphorescent glow. The longer it is exposed, the longer and brighter the afterglow will be.