Acid wash jean
Acid-washed jeans made of denim that had been treated with a chemical, such as sodium hypochlorite or potassium permanganate, which would oxidize the dye and remove some of the color. The acid-washed patterns that were popular in the '80s were achieved by applying chemically treated pumice to the fabric to create the stark, distinctive acid-washed patterns. Acid-washed jeans were often combined with washed or plain denim to create a head-to-toe denim look that was considered the height of fashion.
Fashion and Clothes of the '80s." eHow.com. eHow, n.d. Web. 14 Mar. 2011.