Zermatt Slippers by BIRKENSTOCK The BIRKENSTOCK Zermatt is our first pair of slippers with a removable footbed, giving you the option of three insoles. You can choose between a standard, soft and shearling footbed. All three footbeds can be ordered separately. Perfect all year round! The version shown is our standard model and it features our standard footbed. The shoe imitates a natural footprint in the sand and keeps you comfortable throughout the day. The upper is made of soft wool felt.