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LJ 1 PET Felt Armchair Designed by Laurens van Wieringen


LJ 1 is a generous armchair, recognised by its slim lines and multi-functional design. The chair provides an ergonomically curved seat and back support for outstanding seating experience. LJ 1 is made from PET Felt and recycled high-strength steel, making it a durable and sustainable piece of furniture. The frame is made from 78.8% recycled steel content, further enhancing its sustainable profile. It is a universal armchair for commercial interiors, such as office, hospitality and educational projects. 

Create your own armchair

LJ 1 armchair is fully customisable. Choose from eleven unique PET Felt colour blends for the seat. Combine it with a frame in any preferred RAL colour. The upholstered seat is also available as a custom option. 

Open configurator                      
Mockup Configurator LJ 1
Select version

Select version

Choose from 11 PET Felt blends

Choose from 11 PET Felt blends

Customise frame colour

Customise frame colour

Add seat upholstery

Add seat upholstery


PET Felt colour blends


LJ 1 armchair in projects

We are delighted to see our LJ 1 chair in so many beautiful projects. This PET Felt armchair adapts to any imaginable interior design - you can spot it inside the Google Campus, in meeting centre de Petrus and PONG restaurant. Have we overlooked any cool project with the LJ 1 chairs? Please, let us know!

Designed by Laurens van Wieringen

Laurens van Wieringen is the Amsterdam-based designer, who runs his own studio since 2013. Working in various branches, he specializes in product and interior design. Laurens van Wieringen applies smart solutions and techniques from several fields to achieve the exceptional quality of his designs. Together with De Vorm, Laurens developed several successful product series - LJ chairs, Florian and LW lamps.

PET Felt technology: from bottle to chair

In our design and production processes, we are always looking at where environmental thinking and economic improvement intersect, resulting in minimal waste. The way we utilise PET emphasizes this vision. 

The seat of the LJ 1 is made from recycled plastic bottles. PET Felt technology transforms the labour-intensive production into a single smart 3D pressing technique. PET Felt is recycled and recyclable, offering great comfort and sustainability.


  • Seat and backrest
    Yellow, Pink, Marine, Turquoise, Dark Green, Green, Dark Grey, Olive, Beige, Light Grey, Brown*

    *Due to the recycled content of the PET felt, minor colour differences may occur. 
  • Frame
    Standard: RAL 9011 (Black) / RAL 9010 (White)
    Custom: any RAL colour
    Fine texture: RAL 1012 (Yellow PET), RAL 3005 (Pink PET), RAL 5008 (Marine PET), RAL 5020 (Turquoise PET), RAL 6007 (Dark Green PET), RAL 6020 (Green PET), RAL 7015 (Dark Grey PET), RAL 7033 (Olive PET), RAL 7044 (Beige PET), RAL 7045 (Light Grey PET), RAL 8014 (Brown PET), RAL 9011 (Graphite Black)
  • Cushion (optional)

Hi-Res images

Technical details

  • Weight
    7 kg 
  • Seat depth
    42 cm


  • Shell
    PET Felt
  • Frame
    Powder-coated steel
  • Upholstery
    High-resilience foam

PET Felt




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