About A Chair AAC13, by Hay, is a chair designed by Hee Welling modern and elegant.About A Chair is the result of a 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. The rounded body is made of polypropylene and structure in birch veneer. In line with the style of the brand these chairs are a must in the contemporary Danish.