An orthotic is an insert, either soft or firm, which replaces the insole of your regular shoe. It is classified as either custom or over-the-counter. Custom orthotics should only be made by a podiatrist or physical therapist who has experience treating foot and ankle disorders. The best over-the-counter orthotics are available at running stores or specialty shoe stores. Orthotics can be expensive; therefore, we recommend not spending much more than $60 on an over-the-counter orthotic.