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F4 represents an evolution in user-responsive seating, a graceful, lightweight appearance, and timeless styling. Through thoughtful material selection and component design, F4 was created to comfortably and effortlessly move with its user and support a broad range of seated gestures without requiring manual adjustments.


F4 provides a unique torsion-spring mechanism that is totally concealed within its frame. The geometry of the chair, in combination with the springs, provides comfortable support for a broad range of users without adjustment.

Design and options

Backs may be mesh or upholstered in one of three different styles. Knit seats are an option to match the full range of mesh colors. Frames are available in either polished aluminum or one of 26 powder coat finishes.

Sustainable design features

  • Greenguard Gold IAQ Certified
  • LevelĀ® 2 Certified
  • Recycled content aluminum base, frame, and arms
  • VOC-free powder coat finish
  • Water-based adhesives





Designed by Lee Fletcher and Terry Woodside of Fig40

Terry Woodside has a degree in Mechanical Engineering from Queens University. He has extensive experience in the automotive industry as well as contract furniture.

Lee Fletcher has long been obsessed by the made environment and received his MA in Industrial Design from Manchester Metropolitan University.

The team has been working together for 10 years and have established themselves as a versatile, creative design partnership.

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