Launched in 2015, the soles of the SpringBlade have 16 angled blades made out of polymer, and are meant to create an energetic and springy push-off. The SpringBlade, which costs $180-$200 per pair, was marketed as a running shoe that contained “explosive” energy, which was supposed to “enhance the running experience.”
However, the sole of the SpringBlade was defectively designed and manufactured. When a person walks and runs while wearing the shoe, the midsole is loaded and unloaded while flexing in multiple directions. However, it is these stresses to the shoe that are inherently trying to pull the components of the shoe apart.
