Powsure ERGONOMIC BACKREST Lumbar Support will help you so much. The lumbar support pillows is 100% memory foam, which allows the pillow to conform to the natural curvature of your back and continue to provide the support you need. The design helps increase blood flow, prevents muscle fatigue and back tightness, and allows you to sit comfortably without pain. Other side , our lumbar Cushion is designed to prevent unhealthy sitting positions to make the time spent in your office chair much more comfortable.