A Travel Bug* Dog Tag is a unique tracking tag that you can attach to items and give them goals for others to try and complete! Each Travel Bug gets its own page on geocaching.com where you can track its progress as it passes on from person to person or cache to cache. 
Each Travel Bug* dog tag comes as a pair; one bug gets attached to an item (or on its own) and the other is a copy that you can hold on to. All Travel Bugs* have a unique tracking number stamped into the metal tag. The tag was designed for durability.

*Please note that the word "Travel Bug" and the Travel Bug design logo are registered Trademarks of Groundspeak Inc.