A low cost foldable orthosis for the treatment of foot and ankle conditions including plantar facitis and tendonitis, the orthosis is a foldable molded portion manufactured in a variety of incremental sizes, having a generally U-shaped cross-sectional configuration and a flat foot bed, interconnected by a hinge. This device includes a variety of spacers which enable the angle of covered by a soft fabric covering, and using a removable and interchangeable foot bed wedge insert permitting the angle of dorsiflexion, plantar flexion, inversion and eversion to be varied.