High-Back Cosm - Graphite

High-Back Cosm - Graphite

Your High-Back Cosm chair comes as standard with:
Extended Height Range
High Back
Self Adjusting Tilt
Fixed Seat Depth

With your configured options:
Arm Type: Leaf Arms
Base: Graphite
Colour: Graphite

Estimated delivery is within 10 working days. This will be subject to delivery dates in your area. Please note delivery estimates may be impacted by Covid-19.



  £1,117.00  Special Price  £949.45

Sit in Cosm, and you just might forget you’re sitting in a chair at all. Its sophisticated ergonomic design sets a new bar for instant, personalised comfort, no matter who sat in the chair before you, how long you’ll be in it, or what you’ll be doing. The designers at Berlin-based Studio 7.5 knew, even when working on predecessors like Mirra, Setu, and Mirra 2, that the ideal chair would provide a smooth feeling of natural balance.


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 forces 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 personalised comfort. Studio 7.5 and Herman Miller perfected the self-adjusting tilt by inventing and engineering a complex, finely tuned mechanism. Accounting for the sitter’s vertical force, the gears within the tilt move the fulcrum along a leaf spring to automatically adjust the tilt’s tension.

Available in three different back heights, Cosm gives you a new experience of comfort – anywhere you work.

The German word for design is entwerfen, which roughly translates as “to throw.” According to the designers, 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 to their most sophisticated design yet.

About Studio 7.5

When Burkhard Schmitz and Carola Zwick started their design studio as a team of six in 1992, they were looking for the freedom to work on projects that interested them. And for the freedom from bosses and titles. “Everybody does everything,” says Schmitz, speaking for the group that now includes Carola’s brother, Roland Zwick. “That’s how we cultivate ideas and maintain our openness and curiosity.”

They find designing office chairs to be most rewarding and have worked with Herman Miller on the Setu Chair, the award-winning Mirra chair, Mirra 2, and Cosm. “We define not only how the chair looks but how it performs,” Carola says. As to how Setu, Mirra, and Cosm all perform for you, they provide comfort no matter how or where you sit.


High Back Chair

Full Height: 1140mm – 1300mm
Seat Height: 417mm – 531mm
Seat Width: 678mm – 744mm
Seat Depth: 394mm

➤ Cosm Chair User Adjustment Guide

Care & Maintenance

With regular care and maintenance, your Herman Miller Cosm chair will provide many years of superior performance and satisfaction. To maintain quality, please follow the cleaning procedures outlined here.

Base, Frame, and Armpads

Wash surface with a soft cloth soaked in mild detergent and warm water. Rinse thoroughly and dry with a soft cloth.
Do not use solvents or abrasive kitchen cleaners.

Intercept™ Suspension Material

Vacuum fabric as needed using an upholstery attachment. Vacuuming picks up dust and reduces the need for professional cleaning.
Do not brush fabric or use a vacuum attachment with a rotary brush. Brushing may permanently damage the nap or change the character of the fabric.
Do not apply water or any liquid solution. Wetting the fabric with any liquid solution may result in permanent damage.

Spot cleaning

Immediately soak up the stain with a soft absorbent cloth.
Do not dry the stain completely or it may set. The longer a stain is allowed to remain on a fabric, the more difficult it is to remove.

For Water-based stains such as coffee, soft drinks, fruit juices, or milk, use a water-based cleaner (specifically made for cleaning fabric) or a solution of mild warm soapy water (not overly soapy) applied with a damp clean cloth or sponge.
Work the cleaner into a lather or foam.
Soak up all remaining solution and then use a clean cloth or sponge dipped in cool water to remove any residue.
Never use hot water; it will set the stain. Avoid scrubbing.

For oil-based stains such as lipstick, grease, or salad dressing, use a dry cleaning solution applied with a damp clean cloth or sponge.
Test the cleaning solution on a small, concealed area first. If there is no spotting, ringing, or damage to the fabric or its dyes, apply the cleaning solution to the soiled area with light, quick strokes.

Begin at the outside of the stain and work toward the center, being careful not to over-saturate the fabric. Do not over apply water or any liquid solution to fabric.
Excessive wetting of the fabric with any liquid solution may result in permanent damage to the material.
Do not rub too vigorously or you may damage the nap of the fabric or break fibres. Several light applications are better than one heavy application.

Soak up all remaining solution and then use another clean cloth or sponge dipped in cool water to remove any residue. Let fabric dry thoroughly and then vacuum well before using.

If the stain resists cleaning, contact a professional cleaner.