In both cases, circularity is not a simple label, but the driver of the project. So, in the case of Kata, not only natural materials (solid oak or locust FSC certified) or recycled (polyester yarn composed of post-consumer plastic: each kilo is the equivalent of 48 PET bottles), but an overall approach ecological: “From the very beginning, the circularity perspective has been an integral part of this collection” explain Kata from Altherr Désile Park, a collective of international designers based in Barcelona. “On the one hand, we wanted to introduce a greater variety of materials into the Arper catalog, using natural wood for its artisan taste. On the other hand, we have chosen 3D weaving technology that contributes to the sustainability of the product at different levels. During the production phase, due to the structure of the fabric, the 3D weave makes it possible to produce exactly the amount of material necessary for the seat, as opposed to a common fabric which involves more waste. This ensures the absence of waste or excess material. Furthermore, the 3D texture conveys the sensation of a foam padded cushion, without the reduction of the material used penalizing comfort. Finally, the 3D texture and padding are made of the same material and therefore the entire seat can be recycled without the need to separate the padding from the fabric ".