Cosm™ Chair, Mid Back

Designed by Studio 7.5 for Herman Miller®


Item Number: 100114987
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Free Shipping
Enjoy free shipping on specially marked products. Offer is valid on orders shipped via FedEx within the contiguous U.S.; Alaska, Hawaii and Puerto Rico are excluded. This offer is nontransferable and cannot be combined with other promotions or discounts, nor applied to past purchases or future deliveries. At DWR Outlets, offer is valid only on regularly priced items.
Returns and Exchanges

Returns and Exchanges

Please inspect your purchase immediately upon delivery. If there is a problem with your order, contact your local DWR Studio or our Customer Service team at 800.944.2233 within three (3) days of receipt. You may also contact us at service@dwr.com. If you receive a damaged, defective or incorrect item, we will work with you to make things right.

If you wish to return an item, your refund will be reduced by a restocking charge equal to 10% of the purchase price (accessories, bedding, Sonno mattresses* and towels are exempt), and you will be responsible for outbound and return shipping and delivery charges. Returns must be received in original condition within 30 days of receipt of order. Credit card orders will receive refunds in the form of a credit back to the original account. Check and cash payments will be returned via a refund check or Design Within Reach Merchandise Credit.

Please be aware that furniture is susceptible to damage during transit. We take great care to pack shipments so that they will arrive safely, so be sure to retain the original packing materials, original receipt and all merchandise tags for any item that you wish to return to us. You may have to provide supplementary packing materials if the outer carton has been worn during the original trip out to you.

Shipping charges are not refundable. We do not accept any returns or exchanges on custom or special order furniture. Floor samples and items purchased from DWR Outlets and eBay are sold as is, and all sales are final.

Returns are accepted only at our warehouse; they are not accepted at DWR Studios, DWR Outlets or our company headquarters. To start the return process, please contact Customer Service at 800.944.2233 or service@dwr.com.

*100-Night Sonno® Mattress Sleep Trial

Try Sonno risk-free for up to 100 nights, and a minimum of 30. If you decide to return it, contact your local DWR Studio or call 1.800.944.2233 for a refund and free pickup. One sleep trial per household annually. Delivery fees nonrefundable.

Risk of Loss

All items purchased from Design Within Reach are made pursuant to a shipment contract. This means that the risk of loss and title for such items pass to you upon our delivery to the carrier. If your order is placed with a purchase order, the shipping term of FOB DWR shipping dock will supersede any shipping terms in your purchase order.

Cancellation Policy

In-stock items normally ship within 24–48 hours after an order has been placed. If you order by credit card, your card will be charged as each item is shipped. We will accept cancellation of your order for items that have not shipped or that are on backorder. Once an item has shipped, cancellation is not possible. Custom and special order items cannot be cancelled.



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4 weeks

Item Number: 100114987

4 weeks

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It is in stock and ready to ship, the message "It is in stock and ready to ship!" That means its on hand in our warehouse and will leave within 48 hours of purchase.

Additional Information


A true revolution in seating, the Cosm Chair (2017) is the work of Studio 7.5, the Berlin-based design team that believes strongly in freedom of movement – so much so that their name comes from an idea to place their office in a 7.5-ton truck they could drive from client to client. Unlike chairs that require many adjustments to get the right fit, Cosm instantly responds to your body, movements and posture to provide natural balance and total support, letting you sit down, get to work and simply forget about gravity. The chair for everyone, it’s designed to serve as a smart universal solution for home and corporate offices. ANSI and BIFMA approved. Backed by a 12-year manufacturer’s warranty. Made in U.S.A.

  • Time magazine named Cosm one of the 100 Best Inventions "that are making the world better, smarter and even a bit more fun" in 2019.


Studio 7.5
Studio 7.5


Studio 7.5 operates with few rules. In fact, there’s just one rule: “Join lunch,” says Carola Zwick, one of the partners of the company, which is based in Berlin. “Lunch is special. It’s eating and chatting and getting everybody on the same page. And that’s every day. It’s really the only structure we have in the office.” When she says that, ...

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Product Details


H 38.75"–45" W 26.75" D 26.75" Seat H 16.5"–21"


Injection-molded glass-filled polypropylene frame; Intercept polyester elastomeric seat mesh; seat tilt mechanism; powder-coated or polished die-cast aluminum base; nylon casters for carpeted floors or quiet-roll nylon casters for carpeted and hardwood floors.

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It is in stock and ready to ship, the message "It is in stock and ready to ship!" That means its on hand in our warehouse and will leave within 48 hours of purchase.


0 reviews Be the first to review the Mid-Back Cosm Chair
3.6 / 5.0
8 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Better than my Aeron
I was going to get a Sayl to replace my Aeron chair. After a long sit test, I found this more to be more comfortable than Sayl and Mirra. Reclining on this chair is much smoother than Sayl and the back doesn't cut into your shoulders.

The low back variant is not as comfortable for someone tall and I opted against the high back in case I get too relaxed while seated
January 8, 2020
Very disappointed
The chair came it broken and still waiting for replacement in which supposedly to be sent on 10/24/19 yet didn’t get any shipping detail as of now.
October 27, 2019
Lack of ergonomic support
The chair has only 1 function, adjustment of height, that's all. You can't even lock the chair upright.

No tilt limiter.
No tension control.
No adjustable lumbar.
No fully adjustable arms.
No seat depth adjustment.

If the chair's default adjustment is not suitable, which was what I was facing, that's it.
September 4, 2019
Chair is great
The chair is much better than I hoped it would be. I have a bad back and this chair was very helpful.
July 26, 2019
Renata R.
I have no idea why I let my back suffer all this while without a proper work chair. My back issues have improved dramatically, especially my neck and slump. They must have done a good amount of research to create this specific chair, it provides comfort and ergonomic back care for sure. I love the mesh feature, it cradles me like a solid hammock throughout the day and I'm so glad I've made the investment.
June 25, 2019
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
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

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