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Geometry in motion.

The InFlex light task chair and stool deliver task functionality with fun styling. Designer Giancarlo Piretti fused design and engineering to create the flex-back disc system that follows the spine's natural curve. A stylish, comfortable and affordable standout in a creative office space or anywhere collaboration is called for.

  InFlex multipurpose chair, apple shell 

InFlex multipurpose chair, pacific shell

InFlex multipurpose chair, pacific shell

  • Giancarlo Piretti design
  • Side chair, 24" counter and 30" bar stools
  • Innovative disc system emulates the human spine
  • Plastic model stack 5 on the floor, 12 on the optional cart
  • Upholstered armless models stack 5 on the floor, 10 on the optional cart
  • Fully upholstered, upholstered seat or plastic
  • 14 plastic colors
  • 4 frame finishes
  • CAL 133 approved models
  • 300 lb. weight capacity


Side chair

Counter 24-inch stool

Bar 30-inch stool

Back & Seat

Plastic seat & back

Upholstered seat, plastic back

Upholstered seat & back




Tablet arm left

Tablet arm right

Tablet arm right - oversized

Additional Options


  • 4 glide types (black, floor saver, plush carpet, swivel)
  • Casters
  • Ganging bracket
  • Stacking cart


  • 4 glide types (black, floor saver, plush carpet, swivel)

Plastic Colors - 2 day

These plastic colors require a 2 day lead time.

Latte (SC20)

Black (SC1)

Chocolate (SC4)

Navy (SC5)

Slate (SC8)

Plastic Colors - 3 week

These plastic colors require a 3 week lead time.

Arctic (SC21)

Pacific (SC22)

Apple (SC24)

Lemon (SC25)

Tangerine (SC23)

Bisque (SC7)

Sterling (SC18)

Lagoon (SC15)

Red (SC19)

Frame Finish - 2 day

These frame finishes require a 2 day lead time.

Black (FC1)

Silver (FC2)

Frame Finish - 3 week

These frame finishes require a 3 week lead time.  Pair with plastic colors for monochromatic look.

Bisque (FC7)

Slate (FC8)


Giancarlo Piretti

Piretti's numerous patents and museum showings around the world reflect both his artistic passion and drive to innovate. His view that "art and design should be enjoyed by everybody, in everyday settings" fits SitOnIt Seating's vision for high-quality production and 2-10 day shipping. The result of this collaboration is InFlex, the elegant side chair with Piretti's signature flex-back support in 17 versatile colors. Our growing InFlex family now includes a task chair, task stool and cafe stool.



  • InFlex Brochure (18.0 MB)
  • InFlex Price List  (856.6 KB)
  • InFlex Finish Program (188.1 KB)
  • InFlex Sell Sheet (1.0 MB)
  • Environmental Data Sheets (38.9 KB)
  • Plastics Program (102.8 KB)
  • Feature Spotlight: InFlex (674.8 KB)
  • InFlex AutoCad 2D Files (1.2 MB)
  • InFlex AutoCad 3D Files (11.7 MB)
  • InFlex Revit Files (61.2 MB)