The Vasyli Armstrong II orthotic addresses the key problem areas for the sensitive foot - shear / friction and pressure, by utilizing patented GlideSoft technology. This unique combination of construction and materials has been scientifically shown to reduce shear pressures by over 50%. The dorsal surface of the Vasyli Armstrong II orthotic moves with the plantar surface of the foot. This dramatically reduces shear/friction forces. Thisin-turn assists in the reduction of skin lesions and the potential for infection/ulceration. Rearfoot correction: 4 degrees. Unisex. Heat Moldable. Comes as a pair and are size extra large.