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Humanscale Mid-Back Liberty Office Chair with Arms


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  • Humanscale Mid-Back Liberty Office Chair with Arms

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Arrives for Christmas to Seattle, WA 02108 (Change)

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Product Details
Weight & Dimensions
About the Designer
Niels Diffrient  

Niels Diffrient's designs are grounded in philosophy of form flowing from function. His work has spanned generations, consistently looking past trends to reinvent tools we use for daily living. With an academic foundation in aeronautical engineering and degree from Cranbrook Academy, Diffrient channels his knowledge of fine arts, engineering and architecture into design practice of passion and integrity. His highly functional designs are aesthetically timeless. In his early work with studios of Eero Saarinen, Marco Zanuso, and Henry Dreyfus, to his current work with Humanscale, Diffrient's visionary talent has been widely recognized. Included in his many honors are 2003 National Design Award from Smithsonian's Cooper-Hewitt National Design Museum and 1999 Chrysler Design Award. Most recently he has focused primarily on design for office environment, particularly seating, where he has won many industry awards.

Liberty, with Form-Sensing Mesh Technology, is unlike any mesh chair you've seen or experienced. With its tri-panel construction, Liberty has body-fitting contours that single-panel stretch mesh chairs simply can't achieve. And it offers perfect lumbar support for everyone, without external devices or manual adjustments.


  • Intelligent counter-balance recline mechanism automatically provides right amount of support through full range of recline motion, regardless of user size and weight
  • No tension springs to adjust
  • No recline locks to set or release
  • During recline, angle between torso and legs opens up for better body function
  • User maintains near constant eye level during recline
  • Extra motion of backrest during recline automatically adjusts to changing needs of spine
  • Provides additional lumbar support as needed
  • Carefully sculpted to match body contours
  • Increased contact area reduces pressure points
  • Modular for easy replacement
  • Non-degradable, non-compressible
  • Technogel layer on top of foam core
  • Provides maximum pressure distribution for unmatched long-term comfort
  • Form-sensing mesh provides perfect lumbar support automatically
  • Adjustments for Fit-to-Size include seat height and seat depth
  • Size adjustable to fit over 95% of population
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  • Overall: 26.5" W x 25" D
  • Minimum Overall Height - Top to Bottom: 38.5"
  • Maximum Overall Height - Top to Bottom: 43.5"
  • Overall Product Weight: 27lbs

Weights & Dimensions


  • Armrests Max Height: 32
  • Armrest Width: 4

Additional Weights & Dimensions

  • Overall: 26.5" W x 25" D
  • Seat: 19" W x 25" D
  • Base: 25" W x 25" D
  • Minimum Overall Height - Top to Bottom: 38.5"
  • Maximum Overall Height - Top to Bottom: 43.5"
  • Chair Back Min Height: 22.5"
  • Chair Back Max Height: 22.5"
  • Chair Back Width: 19"
  • Overall Product Weight: 27lbs


Product Type: Task chairs 
Style: Modern
Base Finish: Black 
Base Material: Metal
Hardware Material: Metal 
Warp Resistant: Yes
Upholstered: Yes 
Mechanism: Pneumatic
Swivel: Yes 
Back Height: Mid-back
Back Type: Grid 
Headrest Included: No
Footrest Included: No 
Big and Tall: No
Twenty-Four Hour Chair: Yes 
Adjustable Height: Yes
Ergonomic: Yes 
Tilt Control: Yes
Waterfall Edge: Yes 
Lumbar Support: Yes
  • Passive or Active: Passive
Seat Slider: Yes 
Life Stage: Adult
Casters: Yes
  • Double Wheel Casters: Yes
  • Compatible Flooring: Tile; Carpet; Hardwood
Heated Seat: No
Heated Back: No 
Leg Type: Five-point rolling
Armed: Yes
  • Arm Type: Ergonomic
  • Armrest Material: Vinyl
Adjustable Arms: Yes
  • Arm Adjustment Type: Height
Compatibility: No 
Weight Capacity: 300 Pounds
Commercial Use: Yes 
Recycled Content: Yes
  • Total Recycled Content (Percentage): 27%
  • Post-Consumer Content (Percentage): 19%
Eco-Friendly: Yes 
Country of Manufacture: United States


Assembly Required: Yes 
Additional Parts Required: No


Product Warranty: 15 Year Warranty; Fabric/Cushions/Arm Pads: 5 Years, Single-Shift Warranty 
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Humanscale Mid-Back Liberty Office Chair with Arms

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