Ergonomic Office ChairXUER office chair features an S-shaped backrest that fits your lumbar spine better, protecting your back and shoulders from pain and fatigue from prolonged sitting. W-shaped design sponge cushion, reduce the pressure on your legs, suitable for long-term sedentary work up to 8 hours a day. Breathable Mesh ChairOur computer chairs are made of high-quality mesh, which is resistant to abrasion and not easily deformed. The mesh backrest keeps the air flowing, refreshing and comfortable, so that the summer is not sweltering.