Abstract: A calcaneal inversion-inducing orthotic sleeve and method of wearing helps treat and relieve pressure off the calcaneal. The orthotic sleeve comprises a compression sock that fits over a substantial portion of the foot. The compression sock defines a toe opening, a heel opening, and an ankle opening. An ankle rim extends over the ankles for enhanced fit. The orthotic sleeve also includes a calcaneal inversion strap having a first end and a second end with hook and loop fasteners for attachment. The calcaneal inversion strap is pulled from the first end and wrapped around the base of the calcaneus (heel) from lateral to medial general. The first and second ends are attached. The calcaneal inversion strap induces a slight inversion of the ankle; whereby the orthotic reverses the anatomical abnormality from excess pronation and calcaneal eversion caused by pes planus and other etiologies, while allowing the wearer to heal and perform normal functional activities.