Designed by Niels Diffrient

World LM Task Stool

Minimal design. Full performance. World uses a lightweight design and weight-sensitive recline to deliver effortless, self-adjusting support with less material.

Design Features

  • Weight-sensitive recline

    Weight-sensitive recline

    Adjusts naturally using body weight with no manual controls.
  • Lightweight design

    Lightweight design

    Easy to assemble and relocate in home environments.
  • Designed for elevated seating

    Designed for elevated seating

    Ideal for higher desks and sit-stand setups.
  • Armrests move with the user

    Armrests move with the user

    Attached to the backrest for consistent ergonomic positioning.

Specifications

Variant

SKU

WL13B1J10AU10WS

Seat Textile Type

Fabric

Seat Textile Style

Autumn

Seat Textile Code

0101

Back Textile Type

Mesh

Arm Style

Adjustable Duron Arms

Frame Color

Black

Casters

Multi-Surface Caster for Hard or Soft Floor

Warranty

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

Dimensions

Width

25.75 in

Depth

25 in

Overall Height

35.6 in - 40.75 in

Backrest Height

22.5 in.

Seat Height

18.1 in - 25.6 in

Weight

Overall Weight

27 lb

Weight Capacity

400 lb

Materials & Sustainability

  • Product Materials

    World 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 mesh 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 support at elevated work surfaces.

- Ideal for sit-stand desks, drafting-height tables, and elevated workstations

- Great for hybrid spaces where you need flexible, easy-to-move seating

- A strong fit for home offices, studio setups, and counter-height work areas

Certifications & Testing
  • CDPH
  • BIFMA LEVEL® - Level 3
  • SCS Indoor Advantage Gold
  • Green Tick
  • MID

Care, Maintenance & Longevity

  • Upholstery

    Care instructions vary depending on the selected upholstery. Vacuum regularly using a soft brush attachment to remove dust and prevent dirt from working into the fibers. For spills, act quickly — blot liquids with an absorbent cloth before they set. Stains should be removed by gently dabbing with a lint-free cloth or sponge dampened with clean, warm water. If necessary, add a small amount of mild dish soap, then finish by dabbing with clean water. Avoid rubbing, as this may damage the textile surface. For wool textiles, professional dry cleaning is recommended for anything beyond surface stains. For detailed care instructions by upholstery type, refer to the Humanscale Care Guide.

  • Frame, Base & Components

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

Felt like the chair was protecting us from some of the more insidious side effects of sitting down.

Conforms to your back while weight-sensitive recline adjusts automatically - but barely noticeably - with each movement.

Blends an industrial minimalist design with a slew of feel-good features.

A perfect score for seat comfort and backrest comfort, and we were impressed to note that its 'tri-panel backrest' also provided exceptional lumber support.

A very comfortable chair.

The Humanscale Diffrient World chair has produced a seat that's brimming with effortless ergonomic comfort all contained in a sleek design that adds a touch of modernity to a workspace.

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
4.5
Rated 4.5 out of 5 stars
Based on 6 reviews
Total 5 star reviews: 4 Total 4 star reviews: 1 Total 3 star reviews: 1 Total 2 star reviews: 0 Total 1 star reviews: 0
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6 reviews
  • Liam M.
    Verified Buyer
    Rated 5 out of 5 stars
    Great for my drafting table

    Great for my drafting table. Footrest keeps my legs from dangling. Very comfortable for long sketching sessions.

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  • Anika R.
    Verified Buyer
    Rated 5 out of 5 stars
    Fantastic for drawing and design work

    Fantastic for drawing and design work. Footring really makes a difference for long sessions.

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  • David B.
    Verified Buyer
    Rated 3 out of 5 stars
    Comfortable and ergonomic

    Comfortable and ergonomic. Seat could use a bit more padding. Mesh back is excellent though.

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  • Yuna W.
    Verified Buyer
    Rated 4 out of 5 stars
    Amazing ergonomics for a stool

    Amazing ergonomics for a stool. Footrest and mesh back make it feel like a proper chair, not a stool.

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  • Arya K.
    Verified Buyer
    Rated 5 out of 5 stars
    Footring is perfect for my height

    Lightweight but solid, footring is perfect for my height

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