Disclosed is an ankle-foot orthosis that includes a boot and a pre-tibial shell. The boot includes an inner shell and outer shell between which are included padding and/or structural supports according to the needs of the patient to be treated. The pre-tibial shell likewise includes an interior layer and an exterior layer. Both the boot and the pre-tibial shell are custom molded to a casting made from an injured foot while taped in a non-weight-bearing position and corrected to a position of neutral pathology. Also disclosed is a method for constructing the disclosed ankle-foot orthosis.