An outsole for an orthopedic device includes a heel part, a forefoot part, and a mid-foot part separating the heel part from the forefoot part. A longitudinal axis extends in a longitudinal direction between an anterior end of the forefoot part and a posterior end of the heel part. A transverse axis intersects the longitudinal axis and extends in a transverse direction between a lateral edge of the outsole and a medial edge of the outsole. A bottom surface extends along the longitudinal axis and between the medial and lateral edges. The bottom surface defines an apex at the intersection of the longitudinal and transverse axes and at least one apical line passing through the apex and subtending an oblique angle to the longitudinal axis. The bottom surface curves through the apex and along the at least one apical line in both the longitudinal and transverse directions.
