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