Convention registration number: 06866013 | VAT number: GB 865368680 Birkenstock Zurich SFB will look great barefoot in the summer or with socks in the winter. Crafted from suede, the upper covers the majority of the feet and secures them with two adjustable straps, while the cork footbed and EVA midsole work together at the base to provide the unparalleled comfort the German brand is renowned for.