Spine Lumber Half Roll Cushion provides support for natural spinal alignment, improves posture, and reduces back pain. The D-shaped spine lumbar support prevents the natural tendency to slouch when sitting, which flattens out the back’s natural curve and stretches out ligaments. Recommended for a mild to serious back problem where the lumbar spine needs to be kept in extension. It makes your chair ergonomic, making it comfortable to sit in. The Spine Lumber D-Shaped roll cushion has an elastic strap to fix it in position. It can be used in office chairs, cars, sofas, etc. The velvet cover is removable and hand washable.