Adjustable Ergonomic Mesh Office Chair Both multifunctional adjustment and ergonomics are the features for this computer office desk chair. Seat height,headrest and lumbar support are all adjusted up and down for your comfort. Meanwhile, combines ergonomic design, you can work on this executive office chair for hours a day with no fatigues. Breathable and Comfortable Seat Cushion We use high elastic mesh and high resilience foam for the seat. As we know, the comfort experience is so important for sitting hours. This mesh office chair are high breakable and super comfortable, even you sit for a long time, it still can be kept as it is,and cant be changed.