High quality exclusive footwear, it demonstrates AKU's commitment to seeking design solutions with reduced environmental impact. The inner lining is in full-grain Zero Impact® leather from DANI, the Italian tannery, obtained through tanning and re-tanning processes free of chrome and heavy metals. The external leather is DANI nubuck obtained without the use of chrome and the laces are in natural cotton. The shoe's materials are 99% European. The heel and the toe are protected with the innovative Liba® Smart technique. The Vibram Predator II outsole with an XS Trek Evo rubber mix improves performance and durability.