The Aeron Chair PostureFit SL was designed by Bill Stumpf and Don Chadwick for the Herman Miller brand. The desk chair is designed with an Adjustable PostureFit SL backrest that provides maximum comfort and adjusts to the curve of your spine. It also features a tilt adjustment and seat angle lever that allows you to correct the tilt between fully upright and fully reclined positions. It is also possible to adjust how much resistance there should be when you lean back and the seat angle from horizontal to a 5-degree forward tilt. The desk chair's armrests are upholstered in leather and are fully adjustable, up, down, forward, back, outward and inward. The chair's castors are optimised to roll quietly on hard surfaces such as wood, tiles or carpet. They have a subtle braking function to prevent them from rolling away when stationary and are made of durable nylon with a soft surface that provides a good grip. In addition to this colour, the desk chair is available in several other stylish finishes.