Birkenstock Clogs Mules Zermatt Slippers Wool Felt Shearling Lined Plaid White 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. New in box. Never worn. No flaws. Color: Plaid White ( Black White ) Size: 40 / US 9 ( Narrow Fit )