The Pleats Chair is aluminum chair designed by Il-Seop Yoon that is lightweight with a strong pleat structure. The pleats are structured with a pattern that is widely used in architecture and in fashion. 

The Pleats Chair was made out of one material: recyclable aluminum. By benefiting the structure of the design, the chair was rigid enough with a minimized usage of the raw material.  The beginning of this project was considering the way of creating an object to make it environment-friendly.

'I explored recyclable materials while minimizing the materials used in the chairs. What I found was aluminum. The energy to recycle the aluminum only requires  5% of the energy of producing the new aluminum. The recycled aluminum generally can save a significant amount of the cost of the production of new aluminum, even after the cost of collection, separation, and recycling are taken into account. Aluminum is not only a good material for recycling but also a strong and lightweight material when used to design a chair.'