Birkenstock® Size Chart Please be advised that the Birkenstock® Narrow width accommodates both traditional narrow and medium widths. Click here for more information about Birkenstock’s widths. The enduring Madrid sandal shines on with a patent finish. Upper made with Birko-Flor™: made of acrylic and polyamide felt fibers, this material is a soft fabric with a smooth leather-like finish. The suede lined, contoured footbed will mold to the shape of your foot creating a custom footbed that supports and cradles you each and every step. Anatomically correct cork footbed, crafted from cork that is 100% renewable and sustainable, encourages foot health. 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…