Humanscale World One Task Chair WLT1BR10R10


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  • Fits 95% of the population from 5'-0" to 6'-4"
  • Non-stretch, tri-panel mesh construction provides body-fitting contours, and a self-adjusting lumbar support for an automatic fit
  • Seat slider allows for adjustable seat pan depth
  • No unnecessary levers, locks, or tension springs to set or adjust
  • Standard 5" cylinder
  • No external lumbar parts to adjust, break, or lose
  • Height Adjustable Armrests
  • Fits a wide range of body shapes and sizes
  • Front edge is frameless to eliminate contact stress at the back of the knees
  • Comes with standard hard casters for carpet
  • Designed for users up to 300 lbs.
  • Ideal work-from-home chair
  • Unmatched ergonomic support
  • Available in our most popular configuration: black frame with black mesh for back and seat
  • Warranty: textiles and mesh 3 years, all other components 7 years
  • Some assembly required
  • QUICK SHIP - ships in 5 business days + transit time


  • Seat height (from floor to compressed front center of seat cushion: 15.63" to 20.75"
  • Adjustable Seat Pan depth: 15.7" to 18.25"
  • Seat width: 20.20"
  • Backrest height: 22.5"
  • Backrest width: 16"
  • Adjustable armrest height range (From compressed seat cushion to top of armrest: 7.20" to 10.75"
  • Armrest length: 8.40"

World One is an updated version of Niels Diffrient's renowned World chair, the most minimal, yet fully functional task chair ever made. Featuring the same innovative tri-panel mesh backrest and weight-sensitive recline as its predecessor, World One is a cost-effective solution that delivers highly engineered ergonomic support and the ultimate user-friendly sitting experience. Assembly Required.

Humanscale is the leading designer and manufacturer of high-performance ergonomic products that improve the health and comfort of work life. Their award-winning office solutions – including self-adjusting seating, sit/stand desks, monitor arms and task lighting – inspire movement and support the user in their every posture.