The ultimate chair for lumbar support, the Alphason Portland Executive Ergonomic Office Chair offers you the optimum level of comfort. First of all, the seat and back have been designed to mould to the curvature of your spine to help prevent backache when sitting at a computer for long periods of time. The tilt mechanism also helps you find a comfortable position to work in, as does the tension control feature. You can also adjust the height of this stylish home office chair so you can sit comfortably at the right height for your desk. Features and Benefits Lumbar support with posture curvature - Moulds to the curvature of your spine to give you optimum support. Fully adjustable arms and headrest - Lets you adjust the chair to the most comfortable position for you. Full 'knee tilt' mechanism with tension control - Allows you to tilt your position to prevent any aches or discomfort. Height-adjustable - So you can work at the right height for your office desk. Specifications Material: