Back-Pal Lumbar Support; Lower Back Support; Ergonomic Design for Lower Back Pain Relief. Ideal for Car Office Chair (Black) PATENT elastic support system. This is NOT a pillow; it is a support system instead. This lower back support (lumber support) adopts advanced ERGONOMIC DESIGN with two elastic leaves, which can dynamically and accurately support your lower back. The FLEXIBLE ELASTIC system will help correct your sitting posture WITHOUT giving you uncomfortable feeling when you lean on it. ADJUSTABLE HEIGHT to fit your back curve. There are 5 level height adjustments to move the leaves up and down. Please make an adjustment for your preference. More than DURABLE. Back Pal support passed 100kg & 100,000 times press test. This lumbar support is made of composite PP materials. Solid as always, you can always rely on it. An ideal product for people who suffer from BACK PAIN ISSUES such as spine problems, back tissue damage, back muscle and ligament injury, long day sitting fatigue. Highly recommend to office workers, motorists, pregnant women, the elders, and patients with chronic back pain. 100% Satisfaction GUARANTEE: We are so sure you will love this lower back support. But if not, do not worry, just return it& get a full refund. Your satisfaction is the most important thing to us.