Therersquos a reason why enertor is the only insole worn by usain bolt designed by leading podiatrists and the only insole to use patented d3o smart material enertor insoles offer the most advanced protection yet against injuries engineered by the experts to offer additional support and stability to help maintain optimal lower limb positioning that helps to reduce your risk of injury enertor insoles are proven to help reduce foot and heel pain for over 91 of weare