BOSTON SHEARLING NARROW by BIRKENSTOCK is a unisex clog style, with a sleek slip-on design that can be worn year round. BOSTON features an EVA sole, the classic BIRKENSTOCK cork latex footbed that will support your feet, with anatomically moulded design guiding them into a natural position.TheBOSTONSHEARLING features a sheepskin lining to keep your feet extra comfortable and cosy.