The Madrid Big buckle sandals from Birkenstock are casual and comfortable mules designed for outings and relaxing days. The top and upper are made of nubuck, a soft and durable leather that brings a touch of sophistication to these sandals. The lining is made of velvet leather, offering extra softness to the foot. The insole is made of leather, while the outsole is made of synthetic, ensuring optimal lightness and flexibility. The nubuck leather mule details add a touch of style to these sandals. The beige color is ideal for summer days. The Madrid Big buckle sandals from Birkenstock are designed to offer comfort and lightness throughout the day, allowing you to move around with ease and enjoy your outings.