Abstract: An orthotic for controlling the motion of and supporting the foot of a person is disclosed. The flexural strength of the orthotic is variable or adjustable. The means to achieve the variable flexural strength is primarily located under the medial arch portion of the orthotic. A thinner rigid orthotic and a thinner semiflexible orthotic are thereby achieved, neither of which rely upon the arch portion of the shoe of the wearer for support. The thinness of the orthotic provides for a low fit within the shoe resulting in a proper fit of the person's foot within the shoe. In one embodiment, a formed shell of two layers of plastic of contrasting colors is machined to remove a substantial amount of the bottom layer primarily along the lateral side thereby leaving a thickened portion at the medial arch portion. Heel and forefoot posts are machined into the bottom layer. In another embodiment, thin strips of plastic are heat welded to the medial underside of a formed shell of plastic.