Gravity Defyer Footwear are a shoes manufacturer that debuted their shoes in the year 2008, featuring a spring component as part of the shoe sole to improve impact cushioning. They were initially known for their original logo that was similar to sperm. This brand produces a variety of athletic shoes, casual footwear, and dress shoes. https://thefootwears.com/the-ftc-complaint-against-the-gravity-defyer-footwear/