Birkenstock Charcoal Zermatt Wool Slippers The BIRKENSTOCK Zermatt is our first true slipper. It features our iconic cork latex footbed, and to keep you extra cozy, it’s fully lined in genuine shearling that will keep your feet warm all winter long. The upper consists of soft genuine wool. Anatomically shaped cork/latex footbed lined with shearling Upper: wool felt Footbed lining: shearling Sole: latex Insole shearling is very worn. Outside and sole of shoe in good condition Women’s size 39 (8.5)