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De Vorm

De Vorm BV Dijkgraaf 38, 6921 RL Duiven

© 2026 De Vorm BV

Hale PET Felt Stack Chair

  • Back to ProductsHale PET Felt Stack Chair
  • Introduction
  • Variants
  • Colours
  • Images
  • Projects
  • Specifications
  • Downloads

Introduction

Hale PET Felt Stack Chair goes back to the classic school chair. Simple, functional, no-nonsense. Seat and backrest are moulded from PET felt made of recycled plastic bottles, using a smart 3D pressing technique that replaced multiple traditional production steps with one. The recycled steel frame keeps the chair lightweight and stackable up to eight. Available with or without armrests, and fully customisable to match your project.

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Lightweight, stackable, and easy to reposition. With armrests, Hale suspends from any tabletop to free up the floor in seconds. A chair built for dynamic spaces where layouts change often.

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Two Variants

Hale PET Felt Stack Chair comes with or without armrests. The armrest version adds the option to hang the chair from the table edge when needed.

Without Armrests

Without Armrests

With Armrests

With Armrests

11 PET Felt Colours

Eleven unique PET felt blends, each with its own texture and depth. Minor colour variations between batches are a natural result of the recycled content in the material.

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Dark Grey
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Light Grey
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Dark Green
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Green
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Olive
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Yellow
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Marine
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Turquoise
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Brown
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Beige
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Pink

Bespoke options

Two standard frame colours are available: black (RAL 9011) and white (RAL 9010). Beyond these, specify any RAL colour for the frame, add upholstery, or combine options to match your interior.

Choose any frame colour

Choose any frame colour

The powder-coated steel frame can be finished in any RAL colour. Match it to the PET felt seat or create contrast for a bolder look.

Add upholstery

Add upholstery

For extra comfort, add seat upholstery in fabrics from the Kvadrat collection. A practical upgrade for settings where people sit for longer periods.

Images

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Material

Made from recycled PET felt

The seat and backrest of Hale are made from PET felt, a durable material produced from recycled plastic bottles. Soft yet strong, with natural acoustic properties. De Vorm's single-mould pressing technique shapes the PET felt into a ready-to-assemble form with varying thickness, giving Hale its ergonomic curves and distinctive texture.

Learn more about our PET felt technology

Hale Chair in projects

From offices and educational settings to restaurants and public buildings, see how architects put Hale to work across the world.

Global sports company

Global sports company

Office Amsterdam, the Netherlands by Gensler, Hollandse Nieuwe

Stedelijk Gymnasium

Stedelijk Gymnasium

Education Haarlem, the Netherlands by Brique Architecten, Bureau vandervorm

Merck KGaA

Merck KGaA

Office Darmstadt, Germany by Design in Architektur

Just Eat

Just Eat

Office Amsterdam, the Netherlands by Unispace


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Designer

Designed by Ivan Kasner

Hale is the outcome of De Vorm's collaboration with Ivan Kasner. Ivan Kasner is an Amsterdam-based designer and founder of Ivan Kasner Studio. His approach builds on the idea that each generation deserves its own decor: products that enable people to feel at home in their own time. Together with a team of creatives, Ivan works for international brands within product and interior design.


Specifications

  • Materials
    • Seat and backrest
      PET Felt
    • Frame
      Powder-coated steel
    • Upholstery
      Fabric + high-resilience foam
  • PET Felt
    • Martindale
      100.000
    • Pilling
      3/4
    • Care & Maintenance
      Please see our Care & Maintenance Guide
  • Technical details
    • Weight
      Without armrests: 5 kg (+0.3 kg with upholstery) With armrests: 5.4 kg (+0.3 kg with upholstery)
    • Certifications
      • ANSI-BIFMA X5.1-2017 General purpose office chairs • BS 5852:2006 Ignitability test (performed on PET Felt) • ISO 12947-2:2016 Abrasion resistance test (performed on PET Felt) • ISO 12945-2:2000 Pilling Martindale (performed on PET Felt)
  • Colours
    • 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)
    • Upholstery
      Kvadrat

Downloads

  • Reports & certifications
    • Hale PET Felt Stack Chair + Armrests - Material Passport .pdf Download
    • Hale PET Felt Stack Chair - LCA .pdf Download
    • Hale PET Felt Stack Chair - Material Passport .pdf Download
  • Product documentation
    • Hale PET Felt Stack Chair + Armrests - Productsheet .pdf Download
    • Hale PET Felt Stack Chair - Product Setting Images - Hi-res JPG .zip Download
    • Hale PET Felt Stack Chair - Product Solo Images - Hi-res PNG .zip Download
    • Hale PET Felt Stack Chair - Productsheet .pdf Download
  • Design files
    • Hale PET Felt Stack Chair - 3D Files .zip Download
    • Hale PET Felt Stack Chair - Technical drawing .pdf Download
    • Hale PET Felt Stack Chair Armrest - Technical Drawing .pdf Download
    • Hale PET Felt Stack Chair Armrest Upholstered - Technical Drawing .pdf Download
    • Hale PET Felt Stack Chair Armrests - 3D Files .zip Download
    • Hale PET Felt Stack Chair Upholstered - Technical Drawing .pdf Download