The Birkenstock Zermatt Shearling is Birk’s first true slipper. It features the 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 Details: Decorative stitching “Made in Germany” Footbed material: CorkCork is a sustainable material extracted from the bark layer of the cork oak. This natural product is insulating and offers very good cushioning. Birkenstock Zermatt Shearling Wool Felt Dark Blue