Mid-Back Cosm Chair



Designed by Studio 7.5

Let the Mid-Back Cosm’s instantly responsive and finely tuned design make you forget you’re sitting in a chair at all. Support and beauty exist in harmony, making Cosm a functional sculpture. And with dipped-in-color, it can come in one hue from top to bottom.

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Mid-Back Cosm Chair

Mid-Back Cosm Chair

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Item Number: 100114986

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Item Number: FLC152SFHG1G1G1BKSBK84501
Mid-Back Cosm Chair


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Packaging Type:
Packaging Dimensions:
26" x 21.75" x 33.75"
Package Weight:
Mid Back: 41 lbs
Assembly Required:
Care and Maintenance


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

The instructions for the care and maintenance of Herman Miller products are provided to you as a service. No warranty is implied since results may vary.


Frame, Base, and Standard Armpads

Normal cleaning

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.

Suspension Material

Normal cleaning

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.

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.

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 (alkaline) warm soapy water (not overly soapy) applied with a damp clean cloth or sponge. Work the cleaner into a lather or foam.

Never use hot water; it will set the stain. Avoid scrubbing.

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.

K2R is also a product that can be used. See product label for complete instructions. 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 fibers. 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.

Large Areas

If large areas are soiled, contact a professional cleaning firm.

User Adjustments
Total Height 38.9-45.5"
Width 26.7-29.3"
Depth 26.7"
Seat Height 14.8-21.4"
Seat Width 20.5"
Seat Depth 15.9"
Arm Height 7.3-11.7"


0 reviews Be the first to review the Mid-Back Cosm Chair
4.0 / 5.0
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5 Stars
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1 Star
Only one flaw, but it's major
If it weren't for one glaring flaw, this would be the best chair I have ever sat in. The mesh provides remarkable support while remaining breathable. The construction felt bullet proof. The look is super sexy.

The issue? You can't lean back without any amount of weight or you end up fully reclined. This was intentional on HM's part as the chair is supposed to sense your weight and recline the perfect amount. Trouble is, it doesn't work right. Mine let me fall all the way back after putting maybe 40% of my weight backward.

This chair is perfect, except that I had to return it.
March 19, 2019
Comfort and Style
Amazing! I have lower back issues that are made worse from sitting long hours at work. I wanted something with lumbar support, but didn’t look orthopedic. For the first time in years I can sit for hours and have no back pain! And the chair looks so stylish.
December 16, 2018
7 months ago
Love it
I just built a new house and ordered this chair for my office. I love how this chair is comfortable without having a dozen knobs to adjust. It just works.
November 11, 2018
7 months ago

Product Q&A

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Where is the Cosm chair manufatured?
Peter T on Nov 14, 2018
Best Answer: The Cosm Chair is manufactured at our headquarters in Zeeland, Michigan.