A customizable ankle-foot orthotic. The orthotic including an ankle brace for installation around a wearer's ankle, the ankle brace including a first wing, a second wing, and a third wing anchored at a point between the first wing and the second wing, the second and third wings independently configurable to couple to a portion of the first wing to enable the wearer to customize the fit. a tension adjustment assembly including one or more strap loops； and an elastic strap operably linking the ankle brace to a wearer's shoe for applying an upward resistive force to the wearer's shoe to prevent inadvertent downward movement of a wearer's foot, the elastic strap threadable through the one or more strap loops such that the elastic strap wraps around the exterior face of the ankle brace and extends at a downward angle to engage the wearer's shoe.
