The BIRKENSTOCK Zermatt is our first slipper with a removable footbed, allowing you to choose between three different insoles. You can choose from the Standard Footbed, the Soft Footbed and the Shearling Footbed. All three insoles can be ordered separately. Perfect for all year round! This basic version of this design features our Shearling Footbed. It comes with a snug shearling lining to keep your feet cozy when the temperatures drop. The upper is made from soft wool felt.