The Teknik Office Ergo Plus Headrest Blue Fabric Executive Operator chair is one tough cookie. Certified for 24 hour use (BS 5459-2: 2000) and rated up to 24 stone, you won't get a hardier contract chair for call centres, operation hubs and a variety of other office environments. The smart padded blue fabric ensures it will blend in with any colour scheme. It has height adjustable Comfort arms and a sturdy ultra pyramid shaped nylon base included. Other features include an position adjustable headrest, height and lumbar adjustable backrest, anti-shock function, 2:1 back and seat syncron (5 position), 4 position seat slide, and gas lift seat height adjustment. So many features!