This 80sTees.com exclusive Christmas Vacation t-shirt shows Marty Moose celebrating the holiday by wearing a Santa Claus hat. In National Lampoon's Christmas Vacation, Clark Griswold was seen drinking out of a Marty Moose. This was a callback to the Griswold family's first Vacation adventure to Walley World, where Marty Moose was the beloved mascot. For any fan the 1989 classic starring Chevy Chase, this 80sTees.com exclusive Green Moose Head With Santa Claus Hat Christmas Vacation T-Shirt is a must have!