This sturdy posture chair provides comfort without the hefty price tag. The best in ergonomic chairs, it is physio-approved and offers the benefits of a Permanent Contact Back (PCB) mechanism with an inflatable lumbar support and adjustable arms. The curved foam back offers full contact and comfort for up to 8 hours for users up to 115 kg. Ergonomic chair with adjustable arms Inflatable lumbar pump to support the lower back PCB mechanism provides support whichever way the user moves Curved foam back provides up to 8 hours of comfort Classic style 5-star base with castors as standard Tested to BS 1335 (2000) Part 2 certification 5-year guarantee Seat Dimensions (WxD): 460x450mm Back Dimensions (WxD) 440x490mm