Talarmade Prostep Full Length Orthotics - Blue Medium DensityRationale: Patients with a low arch tend to pronate excessively and it becomes more difficult to restore a stable mid foot before the heel lifts during walking and running. Even though pronation is a normal movement, if the foot remains in this position the midfoot (midtarsal joint) remains unstable. As the opposite foot swings forwards the arch collapses towards the inner side of the foot. This prevents the big toe joint from bending correctly