Today, the essence of social well-being seems to be a map drawn by the OZN Sustainable Development Goals, where design has its path of responsible production. The original method of steel forming with FiDU internal pressure, which is the foundation of the activities conducted by Oskar Zieta Studio, is a real way to reduce energy consumption and produce objects in accordance with the circular economy model. The fascination with the material turned out to be the key to the gates of sustainable development 20 years ago. Oskar Zięta, during his research on the properties of steel at the ETH University in Zurich, initiated and continues to optimize the production of metal objects. These many years of studies and consistent work in one matter today result in technology that allows the creation of monomaterial, ultra-light objects that are extremely durable and recyclable. The optimization of the weight index (lightweight index) in 2020 led the ULTRALEGGERA chair to the highest podium of the MATERIALICA Design + Technology Award in the product category. After two years, Zieta Studio's offer includes the entire ULTRALEGGER family with a 1.5-kilogram stool or a coffee table weighing 5790 g.