Nike Free Trainer 7.0In the beginning, there was the only the foot, and it was good enough. With all the current buzz about the benefits of barefoot running for strengthening the feet and legs, preventing injuries, and improving balance, stride, and posture, Nike has created a lightweight, highly flexible shoe to simulate the effects of barefoot running called the Nike Free 7.0. This new shoe not only protects the feet from some of the hazards of barefoot running in the city, but also distributes the landing pressure over a larger area to reduce stress on the legs, knees, and back. Never run barefoot? Don't worry, Nike includes a training guide with most models of these shoes and on NikeFree.com.