Abstract: A corrective foot insole for sufferers of an uncompensated forefoot varus, more commonly known as flexible flat foot. The corrective insole has a forefoot and a midfoot portion. The forefoot portion of the insole provides a lift for the two interior toes a distance back to, but not including the heel of the foot. The midfoot portion provides an additional lift to the metatarsal by use of a support arch which is located on top of the forefoot portion. The corrective foot insole allows the midfoot to rotate into supination. The entire first metatarsal and two interior toes are lifted into a position to compensate for the forefoot varus, and this insole also maintains the normal alignment position, motion and function of the entire foot during use of the corrective foot insole while maintaining the heel of the foot in its normal position.