The Lira chair offers ergonomic comfort along with a modern sleek design that is a perfect addition to your home office or business.\r\nThe high back with breathable mesh and integrated lumbar support maximises comfort and encourages good posture.3-year guarantee. Seat slide adjustment =Yes Height adjustment = Yes\r\nMesh back =Yes Weight balance = Yes Lumbar support = Yes Adjustable armrest = Yes, height adjustable .Headrest = No | Back position locking mechanism = Yes. 2 locking position