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. Update your Birkenstock® collection with the snake-print Madrid sandal. 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. You will enjoy your Birkenstock sandals for years because they can be repaired, resoled or even completely renewed. Heat Warning - Cork footbeds or EVA soles can be damaged by exposure to concentrated heat. Do not leave your footwear in direct sunlight or in closed cars on warm days. If your footwear becomes wet, allow it to air dry slowly, away from direct heat. Made in Germany. Measurements: Weight: 5 oz Product measurements were taken using size 38 (US Women's 7-7.5), width Narrow. Please note that measurements may vary by size.