Upgrade your office setup with this modern task chair. Its aluminum frame, plastic back construction, and upholstered seat create a sleek and comfortable design. Featuring adjustable height and a tilting function, it allows you to find the perfect position. With its swivel feature, you can easily move around your workspace. Suitable for both residential and non-residential use, this chair is designed to elevate your work experience. - 4D arms support the neck and shoulders - Built-in lumbar support plus optional, additional adjustable lumbar that moves in a 3.5" height range providing extra support for the lower back - 5-position backstop limits the degree of recline - Tilt tension control for supportive reclining - Seat depth adjusts 3" front to back to support your upper legs and relieve pressure on the backs of your knees - Optional height-adjustable lumbar support adds adjustment that moves up and down in a 3.5" range - Ember, Lagoon, and Deep Sea are equipped with the polished aluminum base. Heathered Grey and Charcoal Black have been fitted with a sturdy plastic base.