Ergonomic: Fitted with an adjustable, ergonomic lumbar support system - built to help prop up your posture and take pressure off of your back. Suitability: This chair is able to support a weight of up to 136kg and a height range of between 5'6" to 6'4". Chair: Grab yourself a gaming chair. Adjustable: Use the gas lift to position the chair so your legs are always at that perfect 90° angle, and the backrest reclines up to 139°. Durable: Crafted with sturdy steel tube framing, a plywood support frame and a steel reinforced wheelbase. Razer Lumbar Support Gaming Chair | Living Social