The Birkenstock Zermatt Shearling FE is Birkenstock's first true slipper, designed for ultimate comfort and warmth. It features the iconic cork latex footbed, fully lined with genuine shearling to keep your feet cozy all winter long. The upper is crafted from soft, genuine wool felt. This slipper has an anatomically shaped cork/latex footbed lined with shearling, a wool felt upper, a shearling footbed lining, and a latex sole. Details include decorative stitching. Upper material: Wool felt. Insole: Shearling. Footbed material: Cork.