The Highlander provides active patients with long residual limbs an efficient and smooth gait, with excellent energy return. A split toe provides excellent inversion-eversion, allowing users to walk and run with confidence on uneven terrain. The Highlander can be used with exoskeletal systems or users weighing up to 500 lbs. As a result, amputees once limited to lower functioning products can now enjoy the benefits provided by a premium energy storage and return device so they can walk farther, faster, longer.