This ergonomic high-back mesh desk chair features prominent lumbar support that fits the natural curvature of the spine, promoting healthy posture during long work hours. The breathable mesh back and high-density sponge seat provide all-day comfort, while the flip-up armrests save space when not in use. The adjustable headrest offers customizable neck support, and the pneumatic seat height adjustment ranges from 18.5 to 22.2 inches with a 360-degree swivel base.The chair includes a rocking mode from 107° to 144° for relaxation, and comes with all necessary assembly tools and a user manual. With a maximum weight capacity of 250 pounds, it is suitable for office, bedroom, study, or gaming room use on hard floors. Key Features Material Type Metal Frame Material Type Alloy Steel Seat Material Type Foam Back Style Mesh Back Item Weight 24.5 pounds Item Dimensions D x W x H 20.1 x 20.0 x 53.0 inches Seat Depth 18.1 inches Maximum Weight Recommendation 250 Pounds Included Components A Chair, Assembly Tool, User Manual Is Assembly Required? Yes Highlights ✓ 【Ergonomic Lumbar Support】The ergonomically designed backrest of our ergonomic office chair has prominent lumbar support to fit the natural curvature of the spine. The Computer Desk Chair with mid-back brings quality and comfort to any office. ✓ 【Comfortable Seat】Ergonomic features an all-elastic premium mesh back and a high-density sponge seat making the mesh office chair a good choice for all-day comfortable office seating. The unique mesh design is skin-friendly and breathable, which keeps you cool all day. ✓ 【Space-saving】Flip-up armrests are available and won't be in your way when not in use. The Armrests of the computer chair provide comfortable support for your arms and can be flipped up to save space effectively while not in use. It is perfect for the office, bedroom, study room, living room, or gaming room. ✓ 【Adjustable Headrest】The Unique Headrest easily adjusts to your requirements. More support for the head and neck can be provided by adjusting the height and angle of the headrest, which can make you feel comfortable and help you avoid soreness from your neck and back! ✓ 【Multifunctional Mechanism】The seat height of this 360° Rotating chair could be easily adjusted by the pneumatic adjustment lever, and the adjustment range is 18.5-22.2 inches. Besides, the rocking mode from 107° to 144° helps you to relax from hard work. Frequently asked questions .pu-faq[open]>summary .pu-faq-c{transform:rotate(180deg)} Does this chair require assembly?Yes, assembly is required. The chair includes an assembly tool and user manual for easy setup. What is the maximum weight capacity?The maximum weight capacity is 250 pounds. Can the armrests be flipped up?Yes, the armrests are flip-up style and can be raised to save space when not in use. Is the headrest adjustable?Yes, the headrest can be adjusted in height and angle to provide customized neck support.