broadway. spring. chair.
It's a chair on springs...how much more can you say than that? Well, this: the Broadway was designed by Gaetano Pesce and, if I understand this right, it's an update of a similar chair from 1939 (that one only had four springs...this one has eight!).
The hype on the Moss site, where I saw it, says "Due to the eight spring feet, this chair, although sturdy and supportive, accompanies the movement of the person sitting in it. It will sway and bend along with the sitter." It also says the price is $1,460.