Gravity Defyer Footwear are a shoe company that launched their shoes in the year 2008, featuring a spring component as part of the bottom to enhance shock reduction. They were initially known for their original logo that was similar to sperm. Gravity Defyer produces a variety of sport shoes, casual shoes, and dressy shoes. https://thefootwears.com/the-ftc-complaint-against-the-gravity-defyer-footwear/