It looks kind of like tufting but the Couch series by Stefan Diez is actually created of a cellular textile structure filled with polystyrene balls. The couch, originally designed for Elmar Flototto, ships flat its destination and is then filled with polystyrene balls upon arrival. The line includes the couch as pictured, armchairs, and a rectangular ottoman. The inner "frame" of the couch is shown below:
What an interesting, fresh take on furniture. It's a step up from inflatable but still flattens out for ease of shipping and moving.