- The Madrid Big Buckle by Birkenstock is the iconic style you love, with contemporary and bold buckles you'll love even more! - Premium leather uppers with an open toe. - Slip-on slide with an adjustable buckle closure. - The leather lined, contoured cork footbed will mold to the shape of your foot creating a custom footbed that supports and cradles you each and every step. - Raised toe bar is designed to encourage the natural gripping motion of your feet, exercising your legs and aiding circulation. - Neutral heel profile and deep heel cup keeps the natural padding of your foot where it belongs, under the heel, distributing your body weight more evenly. - Flexible EVA outsole offers lightweight, shock absorbing support with lasting durability. Madrid Big Buckle Sandal