Pulse Ability Orthopaedic Memory Foam Lumbar Support Cushion for office chair is helpful to relieve lower and mid back pain and tightness from long time sitting or driving; support your back's curve to achieve perfect spinal alignment and promote a healthy posture. The lumbar support cushion is perfect for any chair with backrest. It can also be tucked under the knees or hips while you sleep to keep your spine in a better alignment.