Arizona Diamondbacks 1998 Inaugural Season New Era 59Fifty Fitted Hat (Glow in the Dark Patch Black Teal Green Under Brim) Size:7 1/2 NHL Mesh Button Front 100%

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Arizona Diamondbacks 1998 Inaugural Season New Era 59Fifty Fitted Hat (Glow in the Dark Patch Black Teal Green Under Brim) Size:7 1/2 NHL Mesh Button Front 100%Arizona Diamondbacks 1998 Inaugural Season New Era 59Fifty Fitted Hat in Black & Teal Green Under Brim. Patch: 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.