Ergonomic Executive Office Chair: This ergonomic office chairs humanizes the backrest and lumbar support, bringing the back closer to the natural curve, so that the spine is free from soreness. Helps you maintain a relaxed posture during long working hours. Easier to disperse stress and relieve muscle fatigue. SAFETY & COMFORT: The back office chair adopts high-density smooth and breathable mesh fabric as the back, thick seat cushion and lumbar support, which has good elasticity, is not easy to deform, and remains comfortable for a long time. The thickened explosion-proof seat plate gives you a sense of security and comfort, with double coverage. Max Capacity 275 lbs.