Promotes correct sitting posture to help relieve back pain, shoulder pain and neck pain;Constructed of high-quality foam with a removable, washable Polartec cover and adjustable elastic strap;Supports and aligns the lumbar and thoracic (middle) spine for complete back support;Ensures a natural cervical curve with the head above the shoulders;Measures 18 H x 14 W x 2 D; vertical thoracic pad is 5.5 W