Designed by Niels Diffrient

World LM Task Chair

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

Design Features

  • Tri-panel mesh backrest

    Tri-panel mesh backrest

    Form Sensing Mesh shapes to the sitter for automatic lumbar support.
  • Pivoting backrest

    Pivoting backrest

    Moves with the user to maintain consistent lumbar support.
  • Optional contoured foam seat

    Optional contoured foam seat

    Sculpted to reduce pressure points and improve circulation.
  • Lightweight design

    Lightweight design

    Easy to assemble, relocate, and fit into home environments.
  • Built to last

    Built to last

    Backed by a 12-year warranty on parts and components
  • Armrests move with you

    Armrests move with you

    Attached to the backrest so support stays consistent as you recline.
  • Weight-sensitive recline

    Weight-sensitive recline

    Adjusts naturally using the sitter’s body weight with no manual controls.

Specifications

Variant

SKU

WL11B1J10AU13SS

Seat Textile Type

Fabric

Seat Textile Style

Autumn

Seat Textile Code

0131

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

654 mm

Depth

635 mm

Overall Height

904 mm - 1035 mm

Backrest Height

22.5 in.

Seat Height

424 mm - 546 mm

Weight

Overall Weight

12.3 kg

Weight Capacity

181.4 kg

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 comfort without a complicated chair.

- Ideal for hybrid and work-from-home setups

- Great for smaller home offices where clean design matters

- A strong fit for anyone who wants a streamlined ergonomic chair that still feels premium

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
4.8
Rated 4.8 out of 5 stars
Based on 20 reviews
Total 5 star reviews: 15 Total 4 star reviews: 5 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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20 reviews
  • Samuel S.
    Verified Buyer
    Rated 5 out of 5 stars
    Feels like a quality investment

    Expensive, but feels like a quality investment. Armrests don’t move back, which would’ve been nice, but the comfort outweighs that.

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  • Blake H.
    Verified Buyer
    Rated 5 out of 5 stars
    Wish it could go higher

    Easy to assemble, comfortable, easy to adjust. Wish it could go higher, but still fantastic. I sometimes nap in it while reading at my desk.

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  • Ana T.
    Verified Buyer
    Rated 5 out of 5 stars
    For the comfort and support

    Great chair but pricey. Still, for the comfort and support, it’s worth it. Feels like it will last for years.

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  • Emi J.
    Verified Buyer
    Rated 5 out of 5 stars
    Everything is great except

    Everything is great except the seat back won’t lock in place. Still, the quality feels excellent, and I like how the back adjusts automatically. It’s light but sturdy, perfect for shifting around my home office.

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  • Sora Y.
    Verified Buyer
    Rated 5 out of 5 stars
    Great to sit on

    Love it, great to sit on. Mesh is breathable and supportive, even when I lean back a bit to stretch. Moves easily on the hardwood floor in my office.

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