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High Perfomance + Ultimate Simplicity with Humanscale's Diffrient World

Simplicity is at the core of Humanscale products. Each of our designs is incredibly easy to use with the fewest parts and controls possible. All this is achieved while offering the highest levels of performance and functionality.

That commitment to simplicity led to the development of Diffrient World: a high-performance task chair that fits one or 1,000 users.

Diffrient World is Humanscale's first foray into all-mesh task seating. Designer Niels Diffrient wanted to create the most minimal, full-function task chair ever made. With an innovative tri-panel mesh backrest that provides custom back and lumbar support and a lightweight design, Diffrient World is, like all of Humanscale’s products, simple, beautiful and functional.

The design eliminates the need for traditional mechanisms, instead using the laws of physics and the sitter’s body weight to offer perfect recline for each individual sitter.

Diffrient World offers the ultimate user-friendly sitting experience.

Niels Diffrient designed Diffrient World to offer ease of use and effortless functionality. With weight-sensitive recline that adjusts automatically and armrests that are attached to the back of the chair so they move with the user for ergonomic comfort, Diffrient World provides custom comfort for every sitter. A high quality, affordable task chair with minimal parts, Diffrient World was built with longevity in mind and will look as good in ten years as it does today.

The Diffrient World chair has just two manual settings—one each for seat height and seat depth. All other fittings and adjustments are automatic.

With its weight-sensitive recline, the Diffrient World chair automatically supports every user at every recline position. And its Form-Sensing Mesh Technology provides tailor-made lumbar support without external devices or manual controls. That means Humanscale has replaced knobs, levers and instructions with effortless ergonomic comfort.


Invisible Recline Mechanism

Diffrient World uses the laws of physics and harnesses the user’s body weight to automatically provide the right amount of recline for every individual, every time. Its groundbreaking mechanism-free recline action leverages two parts of the chair’s frame to provide automatic, balanced support throughout the full range of motion for maximum support.

Responsive Bracket

Diffrient developed the chair’s back using the laws of physics, which eliminates the requirement for a separate lumbar support, which tends to create a pressure point and requires manual adjustment. With patented Form Sensing Mesh Technology, the backrest perfectly conforms to the sitter’s entire back as if custom made for them.

Sitting on Air

A truly lightweight chair, Diffrient World replaces the standard cushion seat with a low-abrasion, non-stretch mesh. To maximize comfort, Diffrient eliminated the front edge of the chair, solving a perennial problem of hard edges placing pressure on the knees and contact stress behind the thighs, allowing long-term comfort and total supports for every sitter.

• Designed for users up to 300 pounds

• CAL 133-approved

• Certified by BIFMA level® 3 and GREENGUARD

• May contribute to a number of LEED-CI, -NC and -EB credits

• 15-year 24/7 warranty

Self-Adjusting Recline

  • Revolutionary mechanism-free design harnesses the laws of physics and the user’s body weight

  • Automatically provides appropriate support and resistance regardless of user’s size

  • No unnecessary recline locks or tension springs to set or adjust

  • User maintains near-constant eye level during recline

Pivoting Backrest

  • Extra backrest motion automatically adjusts to changing needs of the spine

  • Adapts automatically to provide additional lumbar support as needed

Form-Sensing Mesh Technology

  • Tri-panel, non-stretch mesh construction creates bodyfitting contours and self-adjusting lumbar support for an automatic, customized fit

  • No external lumbar devices to adjust, break or lose

  • Low-abrasion mesh protects clothing

Mesh Seat

  • Frameless front edge eliminates contact stress behind the knee

  • Low-abrasion mesh protects clothing

  • Optional upholstered seat


  • Adjustable or fixed armrests connect to the backrest instead of the seat to stay with the body during recline

  • Armless model also available

Body Fit

  • Size-adjustable to fit widest range of body sizes

  • Automatically customizes recline resistance and lumbar support for every user

  • Size-to-fit settings for seat height and seat depth

  • Optional height-adjustable armrests for custom arm support


  • Standard casters for hard surfaces

  • Optional soft casters or glides


Download PDF • 8.42MB

A new wave of employees are returning back to the office and the IRG team has been testing a variety of task chairs. Check out our full list of fully ergonomic task chairs we are loving here.

To request a demo or finish samples, please contact


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