"Pardon me, Do you have any Grey Poupon?" The quintessential snobby rivalry of the yellow mustard is here to stay and ready to be worn. Be snootier than ever in the Grey Poupon Dijon Mustard Halloween Costume! This costume includes a foam pullover tunic with arm openings for easy eating and drinking. The costume features a graphic print on the front only in the likeness of the actual product with a polyknit back. Pants and shirt are not included. This costume is a one size and fits most adults.