This electrically heated USB three-speed controlled temperature shoulder guard fits the left or right shoulder and uses hot or cooled shoulder rests for pain relief to enhance physical therapy for recovery from injury and discomfort. It’s commonly used when people suffer sprains, strains, torn rotator cuff, frozen shoulder, dislocated AC joint, AC separation, bursitis, labrum tear, shoulder muscle soreness, tendinitis, joint stiffness. Our shoulder support bands are designed to help get the support needed for all-day and all-night comfort.