MEPHISTO NILTON | Men Cork Sandals Leather Nubuck. This sandal, with its relaxed look, inspires a perfect sensation of well-being. The SOFT-AIR midsole reduces impact to a minimum for a gentle, effortless walk. The AIR-RELAX technology respects the anatomy of the foot to prevent fallen arches. The adhesive strap across the instep adjusts perfectly to your foot.