Barbie Loves the Improvers is a very rare Barbie doll that was a mail-away premium from the Inland Steel Co. It came with Barbie wearing a very MOD outfit that looked like a steel can! Also, a picture of a model wearing the same outfit, supposedly based on a design by Paco Rabanne. There was a cutout for her navel, even though Barbie has no belly button!
This is a photo from a magazine. The doll is very rare and worth thousands of dollars, so if you have one, you’re sure lucky!