Birkenstock Unisex Arizona - Nubuck (Unisex) Leather / Nubuck / Suede Imported Birkenstock&reg; Size and Width Chart Please be advised that the Birkenstock&#174; Narrow width accommodates both traditional narrow and medium widths. Classic Birkenstock&reg; sandal crafted in lush nubuck and featuring adjustable straps to ensure a great fit. Anatomically correct cork footbed, crafted from cork that is 100% renewable and sustainable, encourages foot health. The suede lined, contoured footbed will mold to the shape of your foot creating a custom footbed that supports and cradles you each and every step. Raised toe bar is designed to encourage the natural gripping motion of your feet, exercising your legs and aiding circulation. Neutral heel profile and deep heel cup keeps the natural padding of your foot where it belongs, under the heel, distributing your body weight more evenly. Flexible EVA outsole offers lightweight, shock absorbing support with