A KAFO also known as polio leg caliper is a long-leg orthosis that spans the knee, the ankle, and the foot in an effort to stabilize the joints and assist the muscles of the leg. While there are several common indications for such an Orthosis, muscle weakness and paralysis of the leg are the ones most frequently identified. The most common causes of muscle weakness include: • Poliomyelitis • Muscular Dystrophy • Multiple Sclerosis • spinal cord injury, lightweight knee ankle foot orthosis with intelligent knee joints, allowing the knee to bend during the swing phase of walking and lock securely in stance. Walking freely places a high demand on any bracing system, as the orthosis has to bear the patient’s full body weight when locked. Unlike a traditional fixed calliper, these offer firm stance phase support and a free knee when bringing your leg through in the swing phase of walking. This greatly improves your walking pattern and reduce the amount of energy needed to walk. Knee-ankle-foot orthotics (KAFO) consist of an AFO with metal uprights, a mechanical knee joint, and 2 thigh bands.