Rocker bottom construction allows natural motion from heel to toe encouraging a healthy stride * The design creates a subtle rocking motion that propels you forward while taking the pressure off each step thus reducing the strain on your lower back and legs * Polyurethane outsole constructed and reinforced with a hard plastic frame to provide stability and durability * Approved by the apma for its standards in arch support and orthopedic construction * Anatomically shaped footbed engineered for arch support and a roomy toe box