Birkenstock Boston Womens Shearling Clogs Light Tan Suede Mule Slipper 38 Size 7. Birkenstock Boston Shearling Clogs in Stone Coin suede offer a cozy take on the classic slip-on silhouette. These mules feature a soft suede upper with a plush genuine shearling lining and footbed for ultimate warmth and comfort. Finished with a durable EVA sole, these clogs are perfect for indoor lounging or casual outdoor wear. Made in Germany. Excellent used condition.