Alera Elusion Series 275 lb. Mid-Back Mesh Task Office Chair BlackAleras ergonomic design adjusts to fit multiple users. Cool, breathable mesh back. Contoured seat cushion with waterfall edge to help relieve pressure on legs. Height- and width-adjustable arms with soft polyurethane pads. Five-star base with casters for easy mobility.Ergonomic design adjusts to fit multiple users.Cool, breathable mesh back.Contoured seat cushion with waterfall edge to help relieve pressure on legs.Height- and width-adjustable arms with soft polyurethane pads.Five-star base with casters for easy mobility.Height adjustable ratchet back for optimal lumbar support.Model Number: ALEEL42BME10B