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Explore Opt4 Stacking Chair

Opt4 delivers significant comfort with a waterfall seat edge that eases pressure points. Mesh options offer cooling ventilation as well as supple seating surfaces that conform to body shapes. Simple construction enables disassembly for recycling of components. Mesh is 100% recycled PET bottles. Resin components (back, seat and glides) are 100% recycled PP material.

Designed by Taku Kumazawa | 5 year warranty

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Features & Highlights

  • Lightweight chair is easy to lift, maneuver and stack
  • Available in three classic shell colors (black, stone grey, white) and 31 frame colors, including chrome
  • Mesh seats and backs offer cooling ventilation as well as body conforming comfort
  • Choose from mesh or poly backs with mesh, poly or upholstered seats
  • Optional armrests available
  • Stacks 6-high on floor with or without upholstered seat (stacking on dolly not recommended)


  • Simple construction enables easy disassembly for recycling of components
  • The mesh fabric is composed of knitted yarn made from 100% recycled PET bottles
  • All resin parts (back, seat, glides) are 100% recycled polypropylene
  • Integral seat bumper protects chair when stacked

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