Upholster elements (“Klick-system” - changeable without any tools).Supertec upholstery - Comfortable and soft, breathable and very resistant to external influences. Cut resistant, antislip and easy to clean.Synchronous mechanism (0-23°). The inclination of seat and backrest is automatically adjusted in line with the user’s current posture.The inclination of seat and backrest is automatically adjusted in line with the user’s current posture. This results in dynamic sitting, which relaxes the muscles, relieves strain on the intervertebral discs, improves circulation and boosts concentration and performance considerably. Seat inclination adjustable up to 9°.Backrest height adjustment easily and conveniently to operate, also in a sitting position (60 mm) .