An orthosis for a lower limb is provided. In one aspect, the orthosis is comprised of a shell that is portioned and dimensioned so as to be in close proximity to an anatomical limb. The shell has a leg portion, a foot portion, and a heel portion, the leg portion being fitted over the anterior surface of the leg, the foot portion being fitted over the dorsal surface of the foot, and the heel portion being fitted over the surface of the heel and adapted to lift the heel when a force is applied to the leg portion. The orthosis impedes dorsiflexion and permits plantarflexion.
