A shoulder immobilizer is a supportive brace used to keep the shoulder and arm stable after an injury or surgery. It typically consists of a sling that holds the forearm across the body along with straps that secure the arm against the torso to limit movement. By restricting motion, it helps reduce pain and allows injured structures—such as ligaments, tendons, or bones—to heal properly. Shoulder immobilizers are commonly used for conditions like shoulder dislocations, rotator cuff injuries, fractures, or after shoulder surgery. They are usually worn for a short period during the early healing phase as directed by a healthcare provider.