UPPER Made of PET yarn woven with knit technology that avoids scrap production. This shoe was built with the most advanced technologies in the treatment of biodegradable materials. This ensures that, at the end of the decomposition process, no traces of plastic remain in the environment. The packaging is made with FSC certified papers. LACING Extended Lacing down to the toe taken from the world of climbing, for maximum customisation and a comfortable fit. SOLE The Presa® Sole URB-01 is made in two components. Medium density biodegradable EVA midsole for maximum stability. The outsole is made with a biodegradable compound, which includes natural rubber. It is characterized by an excellent grip and a duration comparable to synthetic rubber.