Introducing the Zermatt Felt Narrow slippers from Birkenstock. The Zermatt is Birkenstock's first slipper with a removable footbed, allowing you to choose between three different insoles. You can select from a standard footbed, soft footbed, and Shearling footbed. Perfect for all year round! This slipper features a standard footbed. The upper is made of soft wool felt with a trendy leopard pattern. Anatomically shaped cork-latex footbed. Upper: Wool felt Sole: Cork-latex Details: Closed toe, decorative seam, decorative stud.