Humanscale TREA

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The Red Dot-Award winning Trea teams a timeless, clean aesthetic with high-performance function. Created in collaboration with visionary designer Todd Bracher, Trea offers intuitive comfort by mimicking the instinctive recline of the human body and embracing the sitter in a supportive shell.

Trea can be adapted for both office and home interiors. The chair’s four-star, cantilever or four-leg bases are interchangeable, so Trea can be customized for different environments and uses while maintaining visual consistency throughout a space.

A Minimal Design for Multiple Spaces - Created in collaboration with visionary designer Todd Bracher, Humanscale’s Trea is a multipurpose chair with a sophisticated design that embodies versatility. Trea offers intuitive comfort through an innovative solid state recline mechanism, while its fresh yet classic aesthetic provides stylish support in office and home interiors. Available with a variety of base, finish and upholstery options, Trea can be customized for use in a variety of spaces.


Technical Drawing

Technical Drawing for Humanscale Trea Versatile Sophisticated Ergonomic Chair



Designed Designed to fit 95% of the office population (5’0” - 6’4” height, 100 lbs. to 300 lbs. weight)
Modular Base Modular base options include: four-leg base, cantilever base, four-star base
Dimensions Width: 22" x Depth: 22.75" x Height: 31.25"
Seat Height Range 18.3"
Recline Range 12° recline
Weight Four-leg: 20 lbs, Four-star: 20.5 lbs; Cantilever: 21.75 lbs
Base Style Four Legs, Cantilever and Four Star
Base Finish White Powder (all chairs), Polished Aluminum (four star only)
Shell Color White or Gray
Glides Standard with nylon glides
  • Seating - Industry-leading 15 Years, 24/7 Warranty

  • All Fabric/Cushions - 5 Years, Single-Shift Warranty

Designed and Assembled Designed and assembled in the United States


  • Innovation - Trea is engineered with a unique solid state recline mechanism that offers the sitter 12 degrees of movement. The chair’s overall modular design makes it easy to upgrade and maintain each of its components, minimizing the environmental impact.

  • Ergonomic Comfort - Trea’s waterfall-edge seat reduces impact to the back of the knees. A contoured backrest gently pivots to follow the natural point of hip rotation, cradling the body’s curves for lumbar support. The sitter can move freely and comfortably, without adjusting any mechanisms or dials.

  • Beauty - Inspired by simple, natural forms, the Trea chair features a sophisticated design that embodies versatility. Functionally flawless and aesthetically pure, Trea offers the most comfort with the least amount of effort, providing stylish support in any space.

  • The Trea chair is ideal for Conference rooms, Collaboration spaces, Cafeterias, Home offices,  Living rooms and Dining rooms

  • Innovative solid state recline mechanism offers a 12° recline without the need for manual adjustments

  • Trea’s contoured shells cradle the body’s natural curves for added lumbar support and mirrors intuitive rotation from the hip

  • A sleek waterfall seat edge reduces impact to the back of the knees and ensures an even distribution of pressure for ultimate comfort and relief

  • Simple, restrained design allows the chair to integrate into interiors without overpowering a space

  • Interchangeable bases and a choice of finishes enable. Trea to be easily customized for different environments and uses, but still maintain a uniform visual throughout