【Ergonomic High Back】This home office chair is thoughtfully designed with an S-shaped high back that conforms to the curvature of your back and lumbar region while providing excellent upper back support. No more back pain or fatigue from long hours of work or meetings. During breaks, you can relax on the 64.5cm/25.4" high back for maximum comfort. 【Straightforward Instructions】All the hardware, connection parts and handy tools are provided in the product package. A detailed step-by-step illustration of assembling procedure is shown in the instruction. 【Convenient Mobility】This computer desk chair is equipped with nylon swivel casters to make sure users can move with the chair effortlessly with a 360 degrees rotation. Durable materials of these 5 casters allow a smooth and steady mobility.