Razer Gaming Chair with Built-in Lumbar Support. An ergonomic gaming chair designed for posture-perfect hardcore gaming. Total lower back support with a built-in, fully adjustable lumbar curve. Plush, dense cushions which provide better contouring. Comes with a head cushion made of highly dense, yet malleable memory foam that molds to the shape of your head. Fully customizable armrests. With a steel-reinforced body, armrests and wheelbase, this ergonomic gaming chair can support a weight of up to 299lbs/136kg