A large poster made out of thick almost plastic material. This enabled it to made double sided.

Most double sided posters are made by actually printing the reverse image on the back side of the poster. Not so with this style - because of the thick plastic material, the posters is almost a large "cell" that light can shine completely through.

I have only ever seen one copy of this poster and probably was made for large theatres in New York or Los Angeles. Made in 1984, this is one of the first examples of double sided poster technology in the US filmmaking.