Celebrating 10 years of geocaching in 2010, this trackable anniversary shirt tag features the logo that appeared on the first geocaching shirts ever sold.

These fun tags are fully trackable at Geocaching.com, each with a unique tracking number so you can follow their travels. Made of aluminum, just like travel bugs, these travelers also come with a chain so that it may be attached to another item. These ‘tee-rackable’ tags measure just under 2" square.