Product description Lucrin - Passport holder - Smooth cow - Leather - Black Passport holder, international format. In full grain leather. 2 interior plastic pockets. Size open : 195 x 140 mm. Size closed: 95 x 140 mm.Material description Smooth calfskin is the most widely used kind of leather and it is also the kind our clients like best. Smooth calfskin is real leather, which is to say that the material is actually leather and not flesh split. Real leather has that grain, the best part of the hide. Calfskin can be used to make all our leather articles.