Birkenstock Madrid Big Buckle pairs a minimalist single-strap silhouette with a prominent metal spike buckle and a nubuck leather upper for comfortable everyday wear. Product image is indicative. Key attributes: Brown | Sandcastle | Nubuck leather | Breathable lining | Excellent cushioning | Lightweight, elastic EVA outsole | Adjustable strap with metal buckle | Anatomical cork-latex footbed | Individual fit adjustment | Single-strap slide | Large spike buckle | Nubuck texture | Develops a natural patina over time | Composition & care: Upper: Nubuck leather | Insole top: Suede | Footbed base: Cork and latex | Outsole: EVA