made from cowhide leather black Warning! Only the back of the pockets are additionally stiffened with 2 mm thick plastic. Suitable for all roll bag of our offer. Decorative rivets are made of an alloy of zinc and aluminum, they are cast with a nickel coating, they do not rust, but they may become dull under the influence of weather conditions. Assembly rivets are made of steel and may rust under the influence of atmospheric conditions.