8 Biker Mice From Mars party hats in original package (opened).  Made by UNIQUE.  Dated 1994 Brentwood Television Funnies, Inc.
These are new/unused.  Package is worn and had a big hole, so I took them out for photo and to examine them.  The hats are in good condition- some shelf-storage wear present - has wear to top of one hat (visible in photo) and some creasing to the bottom of at least one- over all pretty great.  Perfect for your favorite collector!  Relive your favorite birthday!
From my non smoking home.