Ergonomic Support Everyone is different; the lumbar support of Express is height adjustable, enabling you to move it up or down to the right position. Made of soft polymer, the arched panel offers added flexibility to fit the natural curvature of your lower back. The curved backrest gently supports your lower spine, allowing it to remain aligned while you sit. Fits You With a generous height adjustable range, Express can comfortably fit more people. The height-adjustable armrests come with wellproportioned arm pads, allowing your forearms to rest at 90 degrees and your shoulders to automatically relax. Get Circulating The waterfall edge is a contoured foam seat cushion that eases pressure beneath your thighs and maintains healthy blood flow to your legs.