AC 4
Antonio Citterio, 2008
When designing the AC 4, the aim was to subtly integrate the functions required to provide the best level of comfort. The reason for this is that until now, office chairs were either designed with a view to aesthetics or to functional characteristics. The AC 4, by contrast, integrates its ergonomic properties in such a subtle way that the constructional tricks are hidden away. The AC 4 creates a balance between advanced ergonomic functionality and subtle design. The innovative technology is neither showy nor hidden under foam padding. This makes the AC 4 an iconic object with an aura of elegance coupled with uncompromising functionality.
Automatic weight adjustment
The synchronous mechanism with large opening angle and automatic weight adjustment of the backrest resistance ensure that the user’s weight is supported in every sitting position.
Armrests
The multifunctional 3D armrests can be rotated by 360 degrees, which is very useful with e.g. table-oriented work. The aluminium ring armrests are an elegant variation for conferences, especially when leather-upholstered.
Ecology
51% of the materials used to produce the AC 4 are recycled and 94% of all materials are recyclable.
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**Antonio Citterio, *1950, Italy**
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Antonio Citterio, architect and designer, lives and works in Milan. He has collaborated with Vitra since 1988. A series of office chairs and office systems has originated over this period. The Citterio Collection is continually being enlarged.
