Low-Back Cosm Chair


Designed by Studio 7.5


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Low-Back Cosm Chair

Low-Back Cosm Chair

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Item Number: 100114984

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Item Number: FLC342SFPDR1DR1DR1O2R84506


A balance of sculptural form and effortless function, the Low-Back Cosm gives you instant comfort—anywhere you work. It was designed to be as ergonomically innovative as it is beautiful and automatically adjust to anyone who sits down.
Key Features
  • 12-year warranty
  • Named 100 Best Inventions by Time Magazine in 2019
  • Auto-Harmonic™ tilt mechanism automatically adjusts
  • Flexible frame
  • Continuous and breathable seat and back
  • One adjustment for height
  • Wrap-top facilitates casual collaboration
  • Available in three arm styles: Fixed, Fully Adjustable, and Leaf
  • Dipped-in-Color option
  • Made in Michigan at a 100% green-energy facility
Low-Back Cosm Chair


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Packaging Type:
Packaging Dimensions:
26" x 21.75" x 33.75"
Package Weight:
Low Back: 40 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.

Care and Maintenance Guide



User Adjustments
Total Height 34-40.6"
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 Low-Back Cosm Chair
2.3 / 5.0
3 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
This is the worst chair I've ever had to sit in. The office were I work bought these for everyone. My back hurts all day. I constantly feel like I'm going to fall off of it. I'm tall and I have really long legs. This chair may be alright if your only 5'5 or under. I would give it negative stars if I could!!!!
September 13, 2019
Response from Herman Miller
I'm so sorry to hear the Cosm Chair isn't working out for you. I'm reaching out by email to talk with you further about this purchase.
September 16, 2019
Melissa M
Not bad but not for me
I am giving this a one rating, not because it is bad, in fact I think its the most attractive office chair available. However when I went to test it out (mid height), it did not provide any lower back support. I have had two surgeries. I currently use a 20 year old Aeron Chair. I needed a less obtrusive chair for an apartment. I tried the Setu (the rep said it was either going to be a Aha moment or I would not like it). It was an Aha moment and it works well for me. Chairs are very particular to the person. I wish for the simple design of the Cosm Chair it worked, but it did ot.
April 20, 2019
Response from Herman Miller
We're sorry to hear that the Cosm chair didn't work out for you but so glad to hear you are enjoying your Setu chair!
April 22, 2019
Stephanie S
Everything we wanted
Where do you start. We wanted an office chair for home that did not look like an office chair but provided the support of a chair like Aaron. The Cosm does it all for me. It looks great, and I look forward to sitting in it every day. It is so comfortable you forget you are sitting in a chair.
Everything the designers say about the chair is true.
February 5, 2019

Product Q&A

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Browse 4 questions Browse 4 questions and 4 answers
Is this product available in custom colors? Will be any other colors available in future?
Atreides on May 6, 2019
Best Answer: The Cosm chair is available in six colors: Studio White, Canyon, Glacier, Graphite, Carbon, and Nightfall. There are not currently plans for additional colors.
Is the "studio white/mineral" color white or grey? It looks like white in one of the photos but grey in the other.
Colleen R on Mar 29, 2019
Best Answer: The Studio White / Mineral frame has both white and grey. The base and the fabric will be grey. All the plastic components will be white.
would this work for dining room table chair?--we spend lots of hours there
toni ray t on Jul 22, 2019
Best Answer: The Cosm chair would work for a dining room chair. It needs minimal adjustments so it can easily accommodate a range of users. I do recommend reading through the care guide first as a dining room chair is more susceptible to spills and in turn would need more cleaning. Here is a link to the guide - https://www.hermanmiller.com/content/dam/hermanmiller/documents/materials/reference_info/care_cosm.pdf
How much weight can this chair hold?
Jay R on Feb 8, 2019
Best Answer: The Cosm chair is tested and warranted for use by users 350 pounds or less.