The BIRKENSTOCK Zermatt is our first slipper with a removable sole, allowing you to choose between three different soles. You can choose between the standard sole, the soft sole and the sheepskin sole. All three soles can be ordered separately. Perfect for the whole year! The basic version of this model features our standard sole. It mimics the natural footprint of walking on sand and will get you through the day in comfort. The upper is made of soft wool felt.