Herbert Levine spring-o-lators, circa 1956-57.
Beth Levine was the designer for shoe label Herbert Levine (her husband). She created the spring-o-lator after observing a pair of men’s boots that came with an elastic liner which helped prevent the foot from slipping. To prove the spring-o-lator worked on mules, she ran across a hotel lobby during a major convention to show disbelievers that the elastic would help keep the feet in place.
Source: Robyn Michaels
http://www.shoeblog.com/blog/friday-shoe-history-corner-spring-o-later/,http://feeds.feedburner.com/shoeblog?format=xml,{hyperlink}
