This office chair features a backrest and lumbar support designed to fit the natural curve of the lower back. It includes flip-up armrests and adjustable height from 18.5 to 22.2 inches, with 360-degree rotation. It has a high-density sponge seat covered in breathable mesh fabric for long-lasting comfort. The price drops from $49.99 to $29.99. Shipping is free for prime members or on orders over $35.