The shell is of polyurethane foam with glass fibre reinforcement. The foam for the upholstery and the seat cushion is cold cured polyurethane foam. The shell has an adjustable tilt mechanism, which can be adjusted to the weight of the individual user. The tilt mechanism is made of steel, while the adjustment handle is made of polished stainless steel.
The base consists of a satin polished swivel center part (diameter 38x2 mm) of welded steel tubing and a 4-star base in injection molded aluminium. The leg ferrules are in a black-grey synthetic material.