Montreal Expos 35th Anniversary New Era Fitted 59Fifty Hat in Black, Glow in the Dark with Gray Under Brim.

Logo: Glow in the Dark

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.