Custom foot orthotics are precision medical devices used to treat and prevent injuries and painful conditions related to foot and lower-limb function. Placed inside your footwear, foot orthotics help to correct foot position; maintain or improve skeletal alignment of the feet, legs and hips; redistribute pressure; increase shock absorption; and improve general foot function. Custom foot orthotics need to be custom casted, designed and manufactured for your specific individual needs. To achieve this, a three-dimensional cast or mold of your feet must be taken, usually using plaster or a material called impression foam. A truly custom foot orthotic cannot be manufactured or designed by stepping onto a mat or ink pad on the floor. Your feet should be held by the health practitioner in a specific position relative to your specific skeletal alignment and body, then the cast should be taken.