An AFO, or ankle foot orthoses, is a specialized medical device, brace, or splint worn on the leg from below the knee to the foot. AFOs may be worn by individuals who have cerebral palsy, multiple sclerosis, polio, arthritis, diabetes, stroke and many other issues that affect the feet, ankles and even the knees. AFOs are custom-designed to meet the specific needs of each individual, with many different styles available according to the identified medical, biomechanical, and environmental needs. AFOs can be used to manage many conditions, including drop foot, ankle arthritis, ankle pain, side-to-side instability, joint misalignment, muscle spasticity, and leg weakness. AFOs can be rigid, flexible, energy-storing, or articulated, depending on the treatment goals and patient presentation.