ECCO Women's Biom Fjuel Train Oxford 100% Leather/Synthetic Imported Rubber sole Soft nubuck yak leather upper with breathable perforations to deliver an optimal level of comfort Soft strobel insert underneath the inlay sole enhances the cushioning comfort Direct-injected pu midsole foam and biom last, providing long-lasting cushioning and outstanding walking comfort A low-to-the-ground sole construction provides a natural position for the foot and excellent ground adaption Flexible tpu sole with rubber inserts for lightweight and optimal grip