Release Date: 1988
Technology: Reebok ERS

Tubular cushioning in some form has been developed by nearly every manufacturer, from adidas and Nike to K-Swiss. Reebok called theirs the "Energy Return System," or E.R.S., and utilized across virtually every category, starting with the World Trainer running shoe. It didn't have long to shine, as it was quickly eclipsed two years later by a new cushioning technology they dubbed "Hexalite."