Rooby Rooby Roo! Trick-or-treat and Scooby-Dooby Doo! What better disguise to wear while collecting Scooby snacks? Hee he he he he he he! Jumpsuit with attached character hood. Polyester. This is an officially licensed Scooby Doo costume. Please Note: Due to a style change by the manufacturer, the whisker dots are no longer featured on the muzzle of the character hood.