Orthotic inserts are available in two main categories: nonprescription shoe inserts and custom-molded prescription orthotics. Nonprescription inserts can be found in many pharmacies, shoe stores, and sporting goods stores. They are prefabricated and made from a variety of materials, ranging from soft to semirigid. Some can be heat molded to better fit the contours of your foot. Custom-molded orthotics, on the other hand, are prescribed by a doctor and are made from a mold or computer analysis of your foot, providing a high level of personalized support.