Get ready to impress your friends and family with this rare 1979 Ben Cooper Super Sesame Street Oscar the Grouch Costume & Mask Halloween set. Perfect for any Sesame Street fan, this costume is from the 1970s and comes in a size 3-4 years. The iconic blue color of this costume will make you feel like you're in the show! The mask is included with the costume, and is made of high-quality materials that ensure comfort and durability. This costume is perfect for any Halloween occasion and will definitely make you stand out from the crowd. It is made of plastic. The mask is not in very good condition. Look at the picture.