Proenza Schouler Arizona Birkenstocks in Ecru Size 41 New, never worn No box Velcro straps Leather sandals Balanced, unapologetic, and unmistakable, our polished, specchio calf leather imbues the sleek function of BIRKENSTOCK x Proenza Schouler with a purposeful luxury. Paired with our distinctive anatomically shaped footbed, whether dressed-up or dressed-down, the Arizona is youthful, downtown chic at its most effortless.