This is Diadora’s first sustainable and Vegan OK certified running shoe. The main upper, lining and insole are made of Global Recycle Standard certified recycled polyester from post-consumer water bottles. The ideal combination of cushioning and responsiveness, the midsole is made from Bio-EVA, an innovative partially bio-based material. It is lightweight and soft to make the Volo 3 ACBC comfortable and durable. The outsole is made from ReRubber, a highly flexible and resistant rubber that contains both virgin and pre-consumer recycled content where quality factory rubber waste is collected and ground into chips to be used to manufacture new materials. Plus, this shoe comes with a seed paper that you can put into soil and grow your own plant.