The gently rippling form of this chair is intended to follow the contours of the body thereby being very ergonomic. It must have worked because they are very comfortable and would be the perfect chair for a long leisurely dinner. Knoll’s description of them and what the Vignelli’s stated they used as their inspiration is they “capture the lightness and organic ease of a handkerchief drifting in the wind”. Hence their name Handkerchief Chair. This set of six are all black – the slender metal frame is black, the fiberglass reinforced polyester seat and backrest are black, the padded and upholstered seat and back are black, and the foam arm rests are black. Did I tell you these chairs stack as well? They do. How great if you only want two all the time but need more for entertaining. This set is in wonderful vintage condition and ready to use. There are some slight impressions in the seats from stacking which should diminish with time. However, it is possible they could remain somewhat visible. Please examine the photos as we have tried to portray them as they are. I would use them immediately as is. You should too!!!