Abstract: A removable insole for insertion into footwear, includes a forefoot portion for extending at least to metatarsals of a foot; a cupped heel portion having a varus of approximately 7 degrees for the left foot and approximately 5 degrees for the right foot, which slopes from a medial side of the insole to a lateral side of the insole; a medial arch portion connecting together the forefoot portion and the heel portion, and which extends forwardly to approximately a first metatarsal of a foot supported thereby, and extends rearwardly of a front section of the heel portion; an upper surface extending along the forefoot, arch and heel portions, and having a downward inclination from the heel portion to a front section of the arch portion of approximately 2 degrees; and a lateral flange extending around a periphery of at least the heel portion and extending forwardly at least to a midfoot portion of the insole to prevent abduction of a foot supported thereby.