Birkenstock slides with attractive buckle size 39. I wear a US 7.5- 8 and they are just perfect. Lightweight waterproof plastic, comfortable. The Madrid EVA lets you take the iconic style you love wherever water is found. Made completely from ultra-lightweight EVA, this style is water-friendly and flexible. Experience the benefits of our anatomically shaped footbed, whether you're headed to the gym or the pool. Anatomically shaped BIRKENSTOCK footbed Made from a single piece of molded EVA Water-friendly and ultra-lightweight Made in Germany Never worn. I changed my mind. From a non-smoking pet free home. Thanks for looking!