NWT Pottery Barn National Lampoon's Christmas Vacation™ Robe Large With the nostalgic look of Christmas card artwork, this robe is a reminder to have a merry Clarkmas. A cozy cut-up for any collector (especially dad). Experience all the humor of the Griswold Family in our exclusive National Lampoon’s Christmas Vacation™ collection. Made of 100% cotton flannel. Features wide lapel, long belt tie and 2 spacious pockets.