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Herman Miller · Office Chairs

Herman Miller Cosm Low Back

Designed by Studio 7.5 · Herman Miller

Active sitters and collaborative spaces.

$1,345 – $1,820

  • Up to 350 lb
  • 12-year warranty
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Check price at Herman Miller ↗

Summary

A low-back Cosm that adjusts its tilt to you automatically, with almost no controls to set.

Best for

  • People who want to sit down and work without setting tension or tilt.
  • Shared desks, since the Auto-Harmonic Tilt responds to each sitter.
  • Users up to 350 lb, Herman Miller's rating for every Cosm configuration.
  • Anyone who wants a 12-year warranty and a chair that arrives assembled.

Good to check first

  • The Low Back is the shortest Cosm back; Mid Back and High Back are separate versions.
  • Choose the arms when you order: Leaf, height-adjustable, fixed or no arms.
  • The tilt sets itself to your body, so there is no tension knob to adjust.

The trade-off

Very little to adjust and a self-balancing tilt, with less back height than the Mid and High Back versions.

Value check

Lists at $1,345 to $1,820 at the Herman Miller Store, depending on arms, frame and casters.

Price
$1,345 – $1,820
Load capacity
350 lb
Warranty
12 years

What Herman Miller highlights

  • Auto-Harmonic Tilt

    The tilt responds to each person's body and posture automatically. Herman Miller says this gives balanced support and movement without adjustments.

  • Intercept suspension

    The seat and back use a breathable, elastic suspension instead of foam. Herman Miller says it supports you without limiting movement.

  • Flexible frame

    The frame flexes as you move. Herman Miller pairs it with the suspension so the chair follows your changes in position.

  • Three back heights, four arm styles

    Cosm comes in Low, Mid and High Back versions. Arms come as Leaf, height-adjustable, fixed or none.

As described by Herman Miller on its official pages; not a Chairpedia assessment.

Before you buy

Fit (official)

  • Seat height 14.8–21.4 in; seat depth 15.9 in; seat width 20.5 in (Herman Miller specs).
  • Rated to 350 lb.

Delivery and setup

  • Ships fully assembled.
  • Weighs 35 lb.
  • 12-year warranty.

Returns (official policy)

  • Herman Miller Store: return items within 30 days.
  • Check return shipping terms at checkout; other sellers set their own.

Sources: Herman Miller, Cosm specs ↗ (checked Oct 11, 2026) · Herman Miller Store, Cosm Low Back ↗ (checked Oct 11, 2026) · Herman Miller Store, Returns and exchanges ↗ (checked Oct 11, 2026)

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Versions and options

  • Arm options

Specs

Size and fit
Sizes
Low Back, Mid Back, High Back
Seat height
14.8–21.4 in (37.6–54.4 cm)
Seat depth
15.9 in (40.4 cm)
Seat width
20.5 in (52.1 cm)
Back height
19.13 in (48.6 cm)
Load capacity
350 lb (158.8 kg)
Adjustments
Arms
Leaf Arms; Height-Adjustable Arms; Fixed Arms; No Arms7.3–11.7 in (18.5–29.7 cm)
Build and warranty
Warranty
12-year, 3-shift warranty, with limited exceptions
Chair weight
35 lb (15.9 kg)

About Herman Miller

Founded
1923, when D.J. De Pree and Herman Miller bought the Michigan Star Furniture Company
Part of
MillerKnoll, since 2021

The company took Herman Miller's name after he and his son-in-law D.J. De Pree bought it in 1923. By mid-century it was known for modern design after George Nelson brought in Charles and Ray Eames, Alexander Girard and Isamu Noguchi. In 2021 Herman Miller became part of MillerKnoll.

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Questions

How much does the Herman Miller Cosm Low Back cost?

It costs $1,345 – $1,820 at the US Herman Miller Store (chair (Low Back Stool excluded); range across arms, frame and caster options), checked Oct 2026.

What is the Herman Miller Cosm Low Back's weight capacity?

It is rated for 350 lb for the all configurations (US ), according to Herman Miller's official specifications.

What sizes or versions of the Herman Miller Cosm Low Back are there?

It comes in low Back, Mid Back, High Back.

What do owners say about back pain with the Herman Miller Cosm Low Back?

Back pain comes up in 1 owner review summaries. These are owners' own reports, not medical findings.

Where can I buy the Herman Miller Cosm Low Back?

You can buy it from Amazon, the US Herman Miller Store or the Herman Miller Official. Check the configuration, price and return terms before ordering.

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Specs and prices come from the brand sources listed under Specs and next to the price; User Insights link to their originals. Confirm the exact configuration, seller and price before buying. Editorial policy

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