Smugdesk Ergonomic Office Chair, Black Ergonomic Design - When you are spending more than 8 hours in an office, sitting in the same position, a good chair is very important. This ergonomic office chair with adjustable headrest and lumbar support to fit your body curve, ensuring you sit comfortably. Breathable Mesh Material - The breathable mesh material on this swivel desk chair keeps your back and leg cool and comfortable. This design will promote air circulation, allowing you to sit cozily for long hours. Multi-function Mechanism - This mesh office chair has many adjustable features to ensure you to find a good seat position. The headrest and the seat could be up and down, the backrest could be forward and back. Easy Installation - We provide you with installation instructions in the box. The instruction is very simple to follow, no extra tools and fittings needed. The computer task chair can support up to 300 pounds. Rest Assured to Purchase - We offer our customer a 12-month warranty and 100% contentment assurance for this office desk chair. We also have a professional customer service team, so if you have any questions, please do not hesitate to contact us. We are always with you.