Birkenstock Zermatt Dark Blue Wool Felt Sandals Slippers Size 46 US 13. Pre own and shows signs of usage, review all the photosThese Birkenstock Zermatt sandals in Dark Blue Wool Felt are perfect for any casual occasion. With a Slip-On closure, they are easy and comfortable to wear for any outdoor or city activity. The wool lining material keeps your feet warm and cozy during the Fall, Winter, and Spring seasons.The Solid pattern and blue color are versatile and can be paired with many outfits. The sandals have a preppy and nautical theme, making them great for school or college settings. Made in Germany with high-quality wool and materials, these sandals are a great addition to any shoe collection.