Ankle foot orthosis and methods of manufacturing an ankle foot orthosis. In one embodiment, an ankle foot orthosis is disclosed that includes a foot plate constructed to have both a trimmable portion and a non-trimmable portion. The ankle foot orthosis includes a spiral strut coupled with either the hindfoot region of the foot plate laterally of a mid-line for the foot plate or the midfoot region of the foot plate laterally of the mid-line. The spiral strut includes a transition portion that spirals by approximately sixty-five degrees (65°) over less than one-hundred sixty millimeters (160 mm) in height from the bottom surface of the foot plate. The spiral strut also includes an adjustable portion that enables a cuff coupled thereto to be height adjustable. Methods of manufacturing the aforementioned ankle foot orthoses are also disclosed.