Barefoot Science is a foot strengthening system. Similar to walking in sand, our insoles cause the 20 muscles in each of your feet to fire in a way that makes them stronger. As with any muscle, the more they are exercised, the stronger they get. Why do you need strong feet? Because your feet are your foundation and strong, aligned feet are pain-free feet! Not only will your feet benefit, but the rest of your body, including your heels, knees, shoulders, and back will be aligned and pain free as well. Barefoot Science’s insoles correct the cause of your pain versus just accommodating it as do other insoles and orthotics. (Source:http://barefoot-science.com/cause/)