About A Chair AAC22, Hay, a chair is designed by Hee Welling from soft and rounded design. Polypropylene shell and water-based lacquered oak veneer. About A Chair is the result of close collaboration between the designer Hee Welling and HAY. The chairs, comfortable and ergonomic shapes, provide optimum comfort and can be adapted to any space. In this version: Black polypropylene shell and water-based lacquered oak veneer.