Profile: Back Quality Ergonomics B.V. offers stools & office chairs. Our product RH logic 4 has as a high backrest with extra padding to provide support between the shoulders & pronounced support for the curve of the back to provide optimum sitting comfort and strain relief. The backrest narrows towards the top to allow greater freedom of movement for the arms. The chair is supplied as standard with an adjustable neck rest, a lumbar pump, base in grey-lacquered aluminium and castors for carpeted floors.