Thanks for competing. I thought the quiz might be fun. The answer is: Women's Nylons or nylon stockings.
I saw, I think it was a "Discovery" channel program about this product and it was outrageously funny. The country was gripped by its release.
Here are some quotes:
Toward the end of the 1920s an important breakthrough for DuPont Corporation... This led to the invention and commercialization of nylon in 1938--the beginning of the modern materials revolution. (Prior to this, the group yielded neoprene synthetic rubber in 1933.) Dr. Wallace Hume Carothers, the inventor of nylon, at DuPont...