Humanscale Diffrient World Ergonomic Task Chair – Grey Mesh, Black Frame, Adjustable Arms (Refurbished)

The Humanscale Diffrient World is one of the most intelligent task chairs ever designed an award-winning, mechanism-free ergonomic chair from legendary designer Niels Diffrient. This certified refurbished example features the signature Form-Sensing mesh back and seat in grey/silver, paired with a black frame and height-adjustable duron arms.

Unlike conventional office chairs, the Diffrient World has no recline levers or tension dials to fiddle with. Its weight-sensitive recline mechanism uses your own body weight and the laws of physics to deliver perfectly balanced support the moment you sit down making it ideal for shared workstations, hot-desking environments and hybrid offices where multiple users share the same chair.

The tri-panel non-stretch mesh backrest provides targeted lumbar support without the need for bulky external lumbar pads, while the contoured mesh seat keeps you cool and comfortable through long working days. At around 11 kg, it's also one of the lightest full-function task chairs on the market, built with fewer parts for genuine long-term durability.

Every chair is professionally inspected, deep-cleaned and refurbished by our team, then tested across all functions before dispatch giving you a premium ergonomic chair at a fraction of the £800+ RRP.

Key Features

• Weight-sensitive, mechanism-free recline, no adjustment levers needed

• Form-Sensing tri-panel mesh back with built-in lumbar support

• Breathable grey/silver Pinstripe mesh seat and back

• Height-adjustable duron armrests

• Gas lift seat height adjustment

• Lightweight design (~11 kg) with minimal parts for durability

• Five-star base with smooth-rolling castors

• Suitable for users up to 136 kg (300 lbs)

• Certified refurbished inspected, cleaned and fully function-tested

• Sustainable choice: extends product life and keeps furniture out of landfill

Ideal for: home offices, hot-desking, agile working environments, corporate offices, and anyone wanting Humanscale ergonomics without the new price tag.