Birkenstock Zermatt Shearling FE Womens Clogs in Light Grey. The Zermatt is Birkenstock's first true slipper, featuring their iconic cork latex footbed. It is fully lined in genuine shearling to keep your feet warm all winter long. The upper is made of soft genuine wool. Features an anatomically shaped cork/latex footbed lined with shearling. Upper material: wool felt. Footbed lining: shearling. Sole: latex. Details: Decorative stitching.