The Marshmallow sofa was originally issued by Herman Miller in 1956, and appeared in their 1957 catalog. The sofa was dropped in 1961. Despite its popularity, and visibility in Herman Miller publications, only 186 Marshmallow sofas were produced between 1956 and 1961. The 52" version was re-issued in the 1980s as part of the "Herman Miller Classics" line, and continues in production today, though in limited numbers.
The Marshmallow sofa of Nelson must be considered one of the earliest Pop Art furniture designs: the transformation of a traditional sofa into a three-dimensional structure made with colored cushions. The seat and back are supported by a steel construction and the unit has the shape of an axially symmetrical folded-out waffle. Unlike traditional upholstered sofas, it was possible to make it available in numerous colors and sizes thanks to what was at the time a completely novel, additive construction system.
Additionally, the unorthodox sofa hardly seemed suited to contemporary interiors. Production at Herman Miller was therefore discontinued around 1965.