The ID and ACX chairs, designed by Antonio Citterio for Vitra, have recently been updated on two fundamental levels: aesthetic and sustainable.

↑ ACX chairs
Launched in 2010, the ID Chair quickly became Vitra's best-selling office chair, redefining how we think about seating in the workplace. Citterio describes it as "a universe of identities," reflecting its ability to adapt to each user's specific needs. In this update, the basic structure remains, but the components evolve: the Volo fabric now features a broader colour palette, and new functionalities emerge, such as the optional AutoMotion mechanism, which ensures more efficient weight distribution and automatic tension adjustment.

↑ Antonio Citterio and the ID chair family
The ACX, on the other hand, was designed in light of the increasing mobility of contemporary work environments. Instead of multiplying adjustment options, it focuses on simplification: a self-responsive mechanism that automatically adapts to the user, regardless of their physical profile, without the need for manual adjustments.
In common, both chairs reflect the same logic of sustainable and long-term design. They can be updated, customised, disassembled into individual components, repaired, and, ultimately, recycled. More than closed objects, they are systems designed to evolve over time — in tune with the transformations of work itself.