Designed by the Eames brothers, the chair is part of a series of chairs and is made of molded glass-fibre reinforced polyester resin in 1950 as the first mass-produced plastic chair in the history of furniture.
The Eames Plastic Chairs also introduced a new furniture typology that has since become widespread: the multifunctional chair whose shell can be joined with a variety of different bases to serve diverse purposes.
Source: https://www.vitra.com/en-ch/product/eames-plastic-chair