Designed by Niels Diffrient

Liberty Task Stool with Fabric Backrest

A chair that moves with you, elevated. A tri-panel mesh back and weight-sensitive recline deliver continuous, self-adjusting support at any height.

Specifications

Variant

SKU

L133BAUTAU10XFWSNSC

Seat Textile Type

Fabric

Seat Textile Style

Autumn

Seat Textile Code

0101

Back Textile Type

Fabric

Arm Style

Adjustable Height Arms

Frame Color

Black with Black Trim

Casters

Multi-Surface Caster for Hard or Soft Floor

Warranty

15 Years; Fabric/Cushions/Arm Pads/Casters/Wood: 5 Years

Dimensions

Width

26.5 in

Depth

25 in

Overall Height

43.5 in - 51 in

Backrest Height

23 in.

Seat Depth

16.5 in - 18.75 in

Seat Height

21.1 in - 28.6 in

Weight

Overall Weight

34 lb

Weight Capacity

400 lb

Materials & Sustainability

  • Product Materials

    Liberty is constructed using die-cast aluminum, steel, engineered polymers, contoured seat cushion, multi-layer Duron arm pads, and upholstery textile. Die-cast aluminum and steel form the structural frame and recline mechanism. Engineered polymers are used for components requiring flexibility and impact resistance. The back features patented Form Sensing tri-panel fabric that takes on the exact shape of the sitter's back, providing a personalized fit and maximum adaptability.

Who It's For

For people who want ergonomic stool-height seating with a softer, more polished upholstered finish.

- Ideal for standing desks, high workstations, and sit-stand desk setups

- Great for home offices or client-facing spaces where fabric adds warmth

- A strong fit for collaborative zones where seating needs to look as good as it feels

Certifications & Testing
  • HPD
  • DECLARE® - Red List Free
  • Living Product Challenge
  • CDPH
  • BIFMA LEVEL® - Level 3
  • SCS Indoor Advantage Gold
  • Green Tick
  • MID

Care, Maintenance & Longevity

  • Upholstery

    Vacuum regularly using a soft brush attachment. For deeper cleaning, wipe down with a damp cloth — no soap required for routine maintenance. For stubborn marks, a small amount of mild soap solution can be applied and wiped clean with a damp cloth. Allow to dry fully before use.

  • Frame, Base & Components

    Clean metal and plastic components with a soft, damp cloth and mild soap if needed. Dry thoroughly.

The ergonomic designs are not just made for comfort, but also with the hope that they reduce the industry's footprint and use of potentially-harmful chemicals.

A world-class ergonomic task chair with minimalist charms, this office chair projects versatility in both style and function.

This chair looks as good as it feels, with sharp aesthetics centered around lined, tri-panel mesh.

Niels Diffrient designing on board while sitting on Humanscale Freedom Saddle Stool ring base

Design By Niels Diffrient (1928–2013)

Niels Diffrient was a pioneering industrial designer known for his human-centered approach and belief that design should be intuitive and effortless. Often called “the last of the mid-century modernists,” he focused on simplicity, allowing form to follow function in its purest sense. A Cranbrook Academy graduate alongside Charles and Ray Eames and Eero Saarinen, Diffrient went on to shape some of the most iconic products of the 20th century. His work at Henry Dreyfuss Associates helped define modern industrial design, while his research into human factors redefined how products support the body. His partnership with Humanscale introduced a new standard in seating, creating designs that automatically adapt to the user. Diffrient’s legacy lives on in products that are simple, timeless, and designed to improve the human experience.
View Design Story
4.6
Rated 4.6 out of 5 stars
Based on 7 reviews
Total 5 star reviews: 5 Total 4 star reviews: 1 Total 3 star reviews: 1 Total 2 star reviews: 0 Total 1 star reviews: 0
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7 reviews
  • Natalia M.
    Verified Buyer
    Rated 3 out of 5 stars
    Very comfortable stool overall

    Very comfortable stool overall. I use it with a sit-stand desk and switch positions constantly during the day. The back support is excellent, especially for a stool, though I did need a few days to get used to the seat firmness. The footrest ring is sturdy and doesn’t slip, which I appreciate.

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  • Adriana C.
    Verified Buyer
    Rated 5 out of 5 stars
    Bought this for my home

    I bought this for my home studio where my work surface is taller than a standard desk. I didn’t want something bulky, and this looks clean and minimal. The fabric back feels supportive but softer than a plastic shell. I also like that the foot ring adjusts automatically with the height — I don’t have to fiddle with it.

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  • Sarah C.
    Verified Buyer
    Rated 5 out of 5 stars
    Use this stool at a

    I use this stool at a standing-height reception counter and it’s been a lifesaver. I’m constantly hopping on and off throughout the day, and the footrest ring makes it easy to perch without feeling like I’m dangling. The fabric back has just enough flex to support me but doesn’t push me forward. I was worried it would feel unstable at full height, but it’s incredibly solid.

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  • Grace F.
    Verified Buyer
    Rated 5 out of 5 stars
    We installed a few

    We installed a few of these at our standing collaboration tables. People move around a lot, sit briefly, then stand again. The stool feels balanced and secure even at full height. No wobbling. The fabric back is surprisingly supportive for something that looks so streamlined. After a 2-hour session I wasn’t stiff at all.

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  • Rahul R.
    Verified Buyer
    Rated 5 out of 5 stars
    Work at a drafting

    I work at a drafting table and spend long hours leaning forward over drawings. Most stools leave my lower back aching by mid-afternoon. This one doesn’t. The fabric back flexes just enough when I shift positions. The footrest circle feels stable and gives me somewhere natural to anchor my feet instead of letting them hang. Big improvement from my old stool.

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