The Birkenstock Madrid Big Buckle is a minimalist single-strap sandal updated with an oversized metal pin buckle for a bold, refined look. Product image is indicative. Key attributes: Black | Nero | Oiled nubuck leather | Anatomical cork and latex footbed for natural support | Lightweight, shock-absorbing EVA outsole | Smooth leather-lined insole for balanced foot climate | Adjustable oversized metal pin buckle | Easy slip-on single strap | Cork-latex footbed for support | Minimalist single-strap silhouette | Oversized metal pin buckle | Open-edge stitching | Oiled nubuck with natural finish | Composition & care: Upper: oiled nubuck leather | Insole: smooth leather | Footbed: cork and latex | Outsole: EVA