The design purpose of ankle foot orthoses is to ensure lateral stability and support of the ankle and foot, and to provide assistance in foot sagging caused by muscle weakness or paralysis in the front of the foot. Possible conditions that may cause foot sagging include hemiplegia, cerebral palsy, multiple sclerosis, Parkinson's disease, anterior tibial muscle weakness, lower motor neuron disease, and other conditions. Clamps can also be used for postoperative fixation of tendons after surgery. Due to its innovative features, ankle foot orthoses provide immediate relief and support, keeping the feet and ankles in a comfortable and stable position while allowing for continued activity. Size: Small: 35-38 Medium: 38-40 Large: 40-42 X-Large: 42-45 Including: 1 bracketFoot code can be trimmed refer to your shoe shape, available in left or right, men's and women's styles.Thin, flexible foot part can be trimmed with a pair of cast scissors. The Ankle and Foot Orthosis offers instant relief and support, keeping the foot and ankle in a comfortable yet stable position, and allowing to continue being active. Durable, lightweight, thermoplastic material offers comfortable lateral stability to the ankle a foot area, and allows for freedom of essential movement of the foot. For Foot drop due to Hemiplegia, cerebral palsy, MS, Parkinson, weakness of tibialis anterior muscle, lower motor neuron (LMN) disease, and other conditions causing foot drop. Can be used for post-op immobilization after tendon surgery. Size width is a little narror than normal size, please double check to ensure your choice is correct for your right foot or left foot, and refer to the size chart for a proper fit(Second picture).