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 300 lbs. Master of Space Management: The upholstered armrests of the mesh office chair have the function of turning up and down. Comfortable padded armrests relieve elbow discomfort, and the desk chairs adjustable flip armrest feature allows you to retract the armrests after use and place the desk chairs with wheels under you