Ergonomic Design - Our back support for office chair can keeps your spine in alignment and help to relieve pressure on your spine, lower back while working or relaxing, release back pain and correct position. Back-rest With Massage - With premium quality massage granules, mesh back support with massage granules, provide massage feature, make you feel stinging and can effectively relieve the stiffness of your back/waist. Ideal for people who spend much time in sitting or with back pain. Air Flow Mesh Support - Different from memory foam cushions, this lumbar cushion comes with a soft, attractive, breathable mesh cover to keeps air circulating so sweat and moisture doesn't fill it up, so you are cool and comfortable all day long. Easy To Use - Mesh lumbar support is lightweight, so you can take the mesh back support anywhere. With new, strong and adjustable straps, it can be tightened to hold still at the exact position installed in minutes. Portable Lumbar Support - Mesh back support is lightweight, easy to carry and easy to use. Mesh back support with elastic strap, can be installed in minutes, and fix the mesh lumbar support to office chair/car seat. Product size: 37*42cm Material: diving grid cloth, 3, 6 steel wire Color: black Weight: 160g Package includes: 1pc * lumbar support