Gravity Defyer Shoes are a shoe company that launched their shoes in 2008, featuring a spring mechanism as part of the shoe sole to improve impact cushioning. They were originally known for their original logo that resembled sperm. Gravity Defyer produces a variety of sport shoes, casual footwear, and formal footwear. https://thefootwears.com/the-ftc-complaint-against-the-gravity-defyer-footwear/