Orthotics are used to treat a range of foot and ankle conditions, including but not limited to bunions, corns, calluses, high arches, flatfoot, in-toeing/ out-toeing, big toe ailments, hammertoe, claw toe, forefoot pain, neuropathic ulcerations, and heel pain. Common types of orthotics are arch supports, insoles, heel pads, and foot cushions. The two main classifications of orthotics are accommodative and functional; accommodative orthotics are softer and provide extra support and cushioning for improved comfort and reduced distress on the problem area of the foot, whereas functional orthotics are more rigid and treat problems and pain associated with foot and ankle motion. Shapes, sizes, and materials used to construct orthotics vary, depending on the needs of the patient.