Mid-Back Cosm Task Chair - Fully Loaded (Open Box)
Mid-Back Cosm Task Chair - Fully Loaded (Open Box) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Enjoy free shipping within the USA. Express international shipping is also available, with rates calculated at checkout.
Description
Description
This is a genuine Herman Miller product offered as an open-box item by OfficeLogixShop. OfficeLogixShop is not affiliated with, authorized by, or endorsed by Herman Miller or MillerKnoll. "Herman Miller" and "Cosm" are registered trademarks of MillerKnoll, Inc.
Herman Miller Cosm Mid-Back Task Chair, Fully Loaded, Open Box
An open-box Herman Miller Cosm in the mid-back height, which supports you up to the shoulder-blade region, fully loaded and finished in one color from top to bottom. The Auto-Harmonic tilt balances your recline on its own, and the breathable Intercept suspension stays temperature-neutral through long days.
| Model | Herman Miller Cosm, mid back, fully loaded |
|---|---|
| Warranty | 2-year mechanical warranty |
| Color | Graphite |
| Condition | Open box |
| Arms | Height-adjustable |
| Style | Dipped in color: one uniform hue from top to bottom |
| Tilt | Auto-Harmonic, responding to your movement with no adjustment needed |
| Suspension | Intercept, breathable and temperature-neutral |
| Shipping | Free within the contiguous US |
Support that stays out of your way
Designed by Studio 7.5, the Cosm uses a strong but flexible frame that barely interferes with how your upper body moves, so you can reach, turn and lean without the chair pushing back. The mid-back height is the everyday sweet spot: more support than the low back, a lighter look than the high back.
Dimensions
| Measurement | Cosm mid back |
|---|---|
| Overall height | 39" to 45½" |
| Overall width | 29" |
| Overall depth | 26¾" |
| Seat height | 14¾" to 21⅜" |
| Seat width | 20.5" |
| Seat depth | 15.9" |
| Arm height, from seat (adjustable arms) | 7.3" to 11.7" |
Herman Miller Cosm mid-back specifications.
Herman Miller Cosm Mid Back price vs new
A fully loaded mid-back Herman Miller Cosm, open box, for under $1,300.
The new price shown is Herman Miller's starting price for a Cosm Mid Back, with fixed arms. This open-box chair has the height-adjustable arms, which cost more new, and we check it for any issues before it ships.
Fully loaded Cosm: arm adjustment at your desk


On this fully loaded Cosm, the arms adjust in height. Press the lever on the outer arm post to release them, then move the pad to the height you need. The range, 7.3" to 11.7", is measured from the seat, so you can check it against your desk.
Cosm mid back: a functional sculpture you forget you are sitting in


The mid-back Cosm is not just a piece of furniture but a functional sculpture, where support, looks and function come together as one. Its design adapts instantly to your body, movement and posture, for natural balance and comprehensive support, so you soon forget you are even sitting. One Graphite hue from top to bottom adds a touch of elegance and style to any space, from a home office to a conference room.
This one comes fully equipped, with the premium height-adjustable arms. It redefines comfort at work with a sleek, modern design: a sitting experience that transcends the ordinary.
Cosm low, mid or high back: which height do you need?
Herman Miller builds every Cosm on the same seat, suspension and Auto-Harmonic tilt; only the back height changes.
| Back height | Support | New, from (Herman Miller) | At OfficeLogixShop |
|---|---|---|---|
| Low back | Casual movement; ends below the shoulder blades | $1,345 | Refurbished low back |
| Mid back | Up to the shoulder-blade region | $1,660 | This chair: open box, fully loaded |
| High back | Total support, the full height of the back | $1,925 | Not stocked |
Buying an open-box Cosm mid-back chair
Which features make this mid-back Cosm fully loaded?
It comes with height-adjustable arms, the feature that makes it fully loaded. You can also raise or lower the seat, and the Auto-Harmonic tilt sets the recline for you.
What does open box mean for this Cosm chair?
For this Herman Miller Cosm, open box means a lightly used chair that we check for any issues before it ships. A 2-year mechanical warranty covers this open-box Cosm.
What recognition has the Cosm chair received?
TIME included Cosm in its 2019 selection of 100 Best Inventions. That year, the chair also earned the highest Red Dot distinction for office chairs, Best of the Best.
How does the mid-back Cosm compare with the high back?
Choose the mid-back profile for support around the shoulder blades and a visually lighter chair than the high-back version.
Is there a more casual Cosm option?
For a more casual seat with a lower back, consider the Cosm low-back chair. It is the lower-priced alternative in our Cosm range; choose this mid-back version when shoulder-blade support is your priority.
Does the mid-back Cosm have adjustable lumbar support?
There is no lumbar knob or pad. Herman Miller relies on the Intercept suspension instead: it shapes itself to each person's back from the seat up through the mid back and supports the spine as you move.
Who is the Cosm mid back sized for?
Herman Miller sizes the Cosm for people of roughly 5'0" to 6'3" and rates it to 350 lbs. Here the seat goes from 14¾" to 21⅜" high, and the arm pads can sit anywhere from 7.3" to 11.7" over it.
What color is this Cosm mid back?
Graphite, a dark charcoal gray. Like every dipped-in-color Cosm, it carries one hue from top to bottom.
Is there a mid-back Cosm stool?
Herman Miller does make one, for drafting-height work, alongside a low-back stool. We offer this mid back as a desk-height chair only; for a raised desk, look at our Leap V2 stool or Mirra 2 stool.
What shipping options are offered for this chair?
This mid-back Cosm ships free to addresses within the contiguous US. For destinations abroad, we offer international shipping at competitive rates calculated at checkout.
Arrange a visit to our Ohio showroom
You will find our showroom in Lewis Center, Ohio, north of Columbus. Contact us before making the trip.




