Birkenstock Madrid Big Buckle – Sandcastle (Narrow)Effortlessly refined and timelessly versatile, the Birkenstock Madrid Big Buckle in Sandcastle offers a modern update to the brands iconic single strap silhouette. Designed with an oversized statement buckle and a warm neutral Sandcastle finish, this sleek slide adds an elevated touch to everyday styling. The adjustable strap allows for a customized fit, while Birkenstocks signature cork latex contoured footbed provides exceptional arch support and