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. 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. Multi-function Mechanism - This mesh office chair has many adjustable features to ensure you to find a good seat position. The seat could be up and down. Designed with stainless steel, the base of this conference chair is strong, could bear 250lbs. The casters are durable.