Cosm by Studio 7.5

A variety of members of Studio 7.5 sitting in low-, mid-, and high-back Cosm Chairs, reclining, sitting forward, and relaxing.

For the Berlin-based designers at Studio 7.5—Carola Zwick, Roland Zwick, and Burkhard Schmitz—their latest chair for Herman Miller represents something of a holy grail: a design that creates a new reference point for instant, personalized comfort. Cosm’s new Auto-Harmonic Tilt, in particular, has been a goal they’ve worked toward for years.

A close-up of a prototype of the leaf arm on a Cosm Chair.
A CNC machine cuts out a component for a prototype of the Cosm Chair.
A member of Studio 7.5 assembles a prototype.

The designers knew, even when working on predecessors like Mirra, Setu, and Mirra 2, that the ideal chair would provide a smooth feeling of natural balance. “You should have a chair that allows you to change postures as easily as possible,” Roland says. “You can only do that with a chair that is correctly adjusted, so we wanted to build a chair that does that part for you.”

A tilt is to a chair what a transmission is to a car, and like transmissions, some are manual, and others, such as Cosm’s, are automatic. With other self-adjusting models, the chair decides how you should sit by forcing the body to conform to the tilt’s movement. Cosm’s Auto-Harmonic Tilt puts the person first and responds to them—no matter their posture—providing a balanced recline and personalized comfort. Studio 7.5 and Herman Miller perfected the self-adjusting tilt by inventing a complex, finely tuned mechanism. Accounting for the sitter’s vertical force—which is always in flux—the gears within the tilt move the fulcrum along a leaf spring to automatically adjust the chair’s tension.

A number of components as well as prototypes of the auto-adjusting tilt sit out on a workbench.

The tilt alone doesn’t make Cosm the designers’ most refined design to date; a meticulous process of prototyping hundreds of hand-sculpted and 3D-printed parts paved the path toward a seating experience unlike any other. “One of the biggest challenges—or I should say, one of the biggest opportunities—was to determine how to attach the suspension in a way that made it blend into the frame as seamlessly as possible,” Burkhard says. The answer came in the form of small “teeth” that allow the suspension material to clip into the chair’s frame while staying taut for even pressure distribution. The ingenious way that Studio 7.5 has attached the suspension to the frame is a prime example of what they call “industrial craftsmanship”—a guiding light in their design process. “We like a product that is readable so that you can understand, even if you’re not a mechanic or an engineer, how you’re being supported,” Carola says.

Members of Studio 7.5 work on an early prototype of the leaf arm.
A variety of molded leaf arm suspension prototypes sit out on a workbench.
A member of Studio 7.5 shaves down material to make a model during the development of the Cosm Chair.

The chair’s ergonomic design is further enhanced by Cosm’s Leaf Arms—the first of their kind. The design began as an ungainly piece of foam wrapped over wood, but over time, it’s shifted shape, size, and nicknames—including motorcycle seat, half-pipe for your arms, and Dumbo ears. “The elbow is a very delicate part of our anatomy; it wants to be placed in a very soft but firm spot,” Burkard explains. “Cosm’s Leaf Arms follow the overall functional and aesthetic intent of the chair by providing a simple and super slim visual appearance with superior comfort.” Cognizant of how we work today, Studio 7.5 designed the arm to provide comfort for variety of applications. The Leaf Arms make holding a phone or book natural and comfortable, and the angle of the arms mean they don’t get in the way of a desk when it’s time to get back online.

A profile view of a Cosm high-back ergonomic desk chair with leaf arms.
A variety of frames used to test suspension materials for Cosm Chairs sit on the floor or lean against a wall.
A member of Studio 7.5 tests the attachment mechanism for the suspension material.

Although technical and engineering challenges occupied much of Cosm’s development time, Studio 7.5 was no less dedicated to its aesthetic appearance. With its continuous suspension and sculptural form, the chair appears as a single unified object, and not a collection of parts and pieces. This sense of unity is also reflected in its material composure. “The monochrome coloring dematerializes the object,” Burkhard says of the dipped-in-color concept—in which they present the chair in one hue from top to bottom. “The chair is made out of many different metals and plastics, but ultimately, it’s just one thing.”

The German word for design is entwerfen, which roughly translates as “to throw.” According to Carola, that’s “throw something a little bit ahead of the curve, or ahead of what you know, to help pull you in the right direction.” With Cosm, “throwing” led Studio 7.5 and Herman Miller to their most sophisticated design yet.

The men and women of Studio 7.5 sit grouped together on wooden benches in their workspace.

“Design by its nature is collaborative.”

More about Studio 7.5


  • Cosm, by Studio 7.5, received an iF Gold Award in the Office and Industry category at the iF World Design Awards 2020.

    Cosm, by Studio 7.5, received an iF Gold Award in the Office and Industry category at the iF World Design Awards 2020.
  • Cosm by Studio 7.5 is listed by TIME as one of the 100 Best Inventions of 2019—a curation of products selected for making the world better, smarter, and more fun.

    Cosm by Studio 7.5 is listed by TIME as one of the 100 Best Inventions of 2019—a curation of products selected for making the world better, smarter, and more fun.