Hardly used. Medical Ultralight Walking Boot for Ankle Sprains, Stress Fracture, Broken Foot, Achilles Tendonitis The reinforced plastic shell on both sides of this professional medical brace provides a strong hold for the ankle and foot , an aluminum brace conforms to the contours of the foot Steady walking: Rocker bottom design can improve walk performance, and promotes a smoother and more natural gait during rehabilitation to enhance user's mobility, providing necessary strong support and pain relief, thus speeding up recovery in a secure and comfortable way. Wide application: Walking boot is ideal for stress fractures of the foot and ankle, a sprained ankle, broken foot, soft tissue injuries, Achilles tendon rupture, post-operative stabilization or injuries where you are required to immobilize your foot.