BIRKENSTOCK Madrid Big Buckle Sandals, size 36, like new, not worn outside. “Women's beige Birkenstock Madrid Big Buckle slip-on sandals made with a leather strap and tortoise shell adjustable buckle. These ladies' open back sliders are designed with a moulded leather lining, breathable comfort cork-latex footbed and a lightweight EVA, textured sole for grip and support. Upper Material: Leather Sole Material: EVA Leather metallic upper Brass adjustable buckle Leather insock Contoured cork footbed Lightweight EVA sole Birkenstock regular width”