This is an officially licensed National Lampoon's Christmas Vacation Boxer Brief. The National Lampoon's Vacations films that follow the hilarious Griswald family have always been fun comedies! The Christmas Vacation was no different! This boxer brief features an allover repeat pattern of the Griswold station wagon carrying a Christmas tree. It is made of an ultra-soft and stretchy 92% polyester, 8% spandex fabric blend.