To charge the glow in the dark material, leave dice in direct sunlight or under a UV light for at least 30 seconds. When not in use, store dice someplace where they're not in direct sunlight.
Disclaimer: The dice you purchase may not have the same exact design as shown.
Some dice may have small defects (tiny divots from filled voids, slight bumps along the edges of the low face, etc.), but these will not have any effect on the overall balance of the dice.
Any large defects will be listed out and the price will be adjusted accordingly.
