Serta 45135 Wellness by Design Executive Leather Office Chair, Black Flexible air lumbar pivots with movement to correct posture and provide better back support than traditional office chairs Height, tilt, lift, lumbar and arm adjustments allow customized positioning to improve body alignment and alleviate discomfort Deep, layered body pillows and padded headrest for cushioned comfort Hand-Sculpted upholstered arms and soft bonded leather delivers contemporary, professional style 10-Year limited warranty