Pronation is essential to our normal gait, but for some runners, uncontrolled overpronation may lead to problems. For decades, lab studies have noted a correlation between overpronation – especially excessive foot eversion – and lower limb complaints. Historically this insight led many brands down the route of heavy motion control shoes. These shoes incorporate a rigid support structure within the medial side of the rearfoot and under the arch to control heel eversion and increase rearfoot stability. However, we believe there is something more important that requires our focus.