anatomically shaped cork-latex footbed (shearling footbed) upper - wool felt footbed lining - shearling sole - latex clog with extended shaft, decorative stitching, decorative rivet footbed - made in Germany How cute is the Zermatt slipper from Birkenstock? A luxurious slipper with a shearling footbed, which nestles up softly against your foot and adjusts to its contour, to keep your feet cosy and warm all winter long. The upper is made from soft wool felt, all in all the perfect slippers.