The sloping surface of the Dorsi Ramp is not flat, but conical. The sloping surface has been engineered such that the prescribed (10, 15 or 20 degrees) dorsiflexion angle is maintained regardless of the position of the foot.

The compound slope angle is an important feature because with a flat ramp profile children learn to reduce the stretch by rotating one or two feet outwards.

Children tend not to be particularly careful at positioning their feet. Dorsi Ramp encourages correct foot placement and performs correctly in virtually any foot position.