The Birkenstock Zermatt Shearling FE is Birkenstock's first true slipper, designed for ultimate comfort and warmth. It features the iconic anatomically shaped cork/latex footbed, fully lined with genuine shearling to keep your feet warm throughout the winter. The upper is crafted from soft, genuine wool felt, ensuring a cozy and natural feel. The slipper is detailed with decorative stitching. Upper material: Wool felt. Insole: Shearling. Footbed material: Cork. Sole: Latex.