The Birkenstock Zermatt Shearling WZ (narrow version) in women's size is a cozy, warm slipper with an anatomically shaped footbed made of cork and latex. The upper is made of soft, warm wool felt, while the insole is made of cozy lambskin, which should keep your feet comfortable in winter. The anatomically shaped footbed can be removed if you prefer to use one of the other two insoles available from Birkenstock.
