Sold Out SG Bolero Binder Retail Price: ¥20,900 Black Navy x Blue Binder with Scotchgard treatment. This binder is made from chrome-tanned cowhide treated with Scotchgard to enhance water repellency, providing excellent durability and stain resistance against sweat and other elements. The exterior is Black Navy with a Blue interior, a stylish color combination. The surface of the binder has also been treated to give it a natural luster, similar to that of leather, resulting in a glossy finish.