Below is the history of the primary incentive provided (for the early registered runners) in the race packets.
2009 Short-sleeved white Visa Endurance technical shirt with Pats running around the Earth logo on the front of the shirt
2008 Short-sleeved light blue Visa Endurance technical shirt with Pats running around the Earth logo on the back of the shirt
2007 Long-sleeved black Visa Endurance technical shirt with Pats running around the Earth logo on the front of the shirt
2006 Red Visa Endurance (by Milliken) technical shirt and going back to the Pats running around the Earth logo on the back of the shirt
2005 White t-shirt, abandoned Pat for a different take that in retrospect seemed too much like everything else out there
2004 Unbleached beige t-shirt, still another variation with Pat and the Earth
2003 Unbleached beige t-shirt, logo focuses on the basic elements for the 10th annual run
2002 White t-shirt, logo builds on the patriotic red-white-and-blue theme following the 9/11 incident in NY
2001 Beige t-shirt, innovative redesign of the logo to put it in a 2001 Space Odyssey theme 
2000 Beige t-shirt, the beginning of the Earth Run era with introduction of the new Pats running around the earth logo
1999 Heather grey t-shirt, Crafted With Pride in USA logo.  This was the last of the "Textile Run" era
1998 Heather grey t-shirt, Crafted With Pride in USA logo 
1997 White t-shirt, Crafted With Pride in USA logo, and introduction of 'Pat', the unisex running figure.

1996

Heather Grey t-shirt, Crafted With Pride in USA logo, and Cross Country symbol

1995

White t-shirt with trees, Crafted With Pride in USA logo, Milliken logo on the sleeve 

1994

 ??? It is a mystery that is not yet solved.  Anybody have physical evidence of what we gave?  If so, contact us.